The "Ethiopians" According to Diodorus Siculus
Diodorus Siculus was a Sicilian Greek historian who lived from 90 to 21 BC. He wrote, a world history in 40 books, ending it near the time of his death with Caesar’s Gallic Wars. Fully preserved are Books I–V and XI–XX, which cover Egyptian, Mesopotamian, Indian, Scythian, Arabian, and North African history and parts of Greek and Roman history. From his own statements we learn that he traveled in Egypt around 60 BC. His travels in Egypt probably took him as far south as the first Cataract.

Diodorus Siculus, The Library of History, Books II.35 - IV.58, Translated by C.H. Oldfather, Harvard University Press, 2000

On the Ethiopians who dwell beyond Libya and their antiquities (Book III, chaps. 1-7)

1. Of the two preceding Books the First embraces the deeds in Egypt of the early kings and the accounts, as found in their myths, of the gods of the Egyptians; there is also a discussion of the Nile and of the products of the land, and also of its animals, which are of every kind, and a description of the topography of Egypt, of the customs prevailing among its inhabitants, and of its courts of law. The Second Book embraces the deeds performed by the Assyrians in Asia in early times, connected with which are both the birth and the rise to power of Semiramis, in the course of which she founded Babylon and many other cities and made a campaign against India with great forces; and after this is an account of the Chaldaeans and of their practice of observing the stars, of Arabia and the marvels of that land, of the kingdom of the Scythians, of the Amazons, and finally of the Hyperboreans. In this present Book we shall add the matters which are connected with what I have already narrated, and shall describe the Ethiopians and the Libyans and the people known as the Atlantians.

2. Now the Ethiopians, as historians relate, were the first of all men and the proofs of this statement, they say, are manifest. For that they did not come into their land as immigrants from abroad but were natives of it and so justly bear the name of "autochthones" is, they maintain, conceded by practically all men; furthermore, that those who dwell beneath the noon-day sun were, in all likelihood, the first to be generated by the earth, is clear to all; since, inasmuch as it was the warmth of the sun which, at the generation of the universe, dried up the earth when it was still wet and impregnated it with life, it is reasonable to suppose that the region which was nearest the sun was the first to bring forth living creatures. And they say that they were the first to be taught to honour the gods and to hold sacrifices and processions and festivals and the other rites by which men honour the deity; and that in consequence their piety has been published abroad among all men, and it is generally held that the sacrifices practised among the Ethiopians are those which are the most pleasing to heaven. As witness to this they call upon the poet who is perhaps the oldest and certainly the most venerated among the Greeks; for in the Iliad he represents both Zeus and the rest of the gods with him as absent on a visit to Ethiopia to share in the sacrifices and the banquet which were given annually by the Ethiopians for all the gods together:

                            For Zeus had yesterday to Ocean's bounds
                            Set forth to feast with Ethiop's faultless men,
                            And he was followed there by all the gods.

And they state that, by reason of their piety towards the deity, they manifestly enjoy the favour of the gods, inasmuch as they have never experienced the rule of an invader from abroad; for from all time they have enjoyed a state of freedom and of peace one with another, and although many and powerful rulers have made war upon them, not one of these has succeeded in his undertaking.

3. Cambyses, for instance, they say, who made war upon them with a great force, both lost all his army and was himself exposed to the greatest peril; Semiramis also, who through the magnitude of her undertakings and achievements has become renowned, after advancing a short distance into Ethiopia gave up her campaign against the whole nation; and Heracles and Dionysus, although they visited all the inhabited earth, failed to subdue the Ethiopians alone who dwell above Egypt, both because of the piety of these men and because of the insurmountable difficulties involved in the attempt.

They say also that the Egyptians are colonists sent out by the Ethiopians, Osiris having been the leader of the colony. For, speaking generally, what is now Egypt, they maintain, was not land but sea when in the beginning the universe was being formed; afterwards, however, as the Nile during the times of its inundation carried down the mud from Ethiopia, land was gradually built up from the deposit. Also the statement that all the land of the Egyptians is alluvial silt deposited by the river receives the clearest proof, in their opinion, from what takes place at the outlets of the Nile; for as each year new mud is continually gathered together at the mouths of the river, the sea is observed being thrust back by the deposited silt and the land receiving the increase. And the larger part of the customs of the Egyptians are, they hold, Ethiopian, the colonists still preserving their ancient manners. For instance, the belief that their kings are gods, the very special attention which they pay to their burials, and many other matters of a similar nature are Ethiopian practices, while the shapes of their statues and the forms of their letters are Ethiopian; for of the two kinds of writing which the Egyptians have, that which is known as "popular" (demotic) is learned by everyone, while that which is called "sacred" is understood only by the priests of the Egyptians, who learn it from their fathers as one of the things which are not divulged, but among the Ethiopians everyone uses these forms of letters. Furthermore, the orders of the priests, they maintain, have much the same position among both peoples; for all are clean who are engaged in the service of the gods, keeping themselves shaven, like the Ethiopian priests, and having the same dress and form of staff, which is shaped like a plough and is carried by their kings, who wear high felt hats which end in a knob at the top and are circled by the serpents which they call asps; and this symbol appears to carry the thought that it will be the lot of those who shall dare to attack the king to encounter death-carrying stings. Many other things are also told by them concerning their own antiquity and the colony which they sent out that became the Egyptians, but about this there is no special need of our writing anything.

4. We must now speak about the Ethiopian writing which is called hieroglyphic among the Egyptians, in order that we may omit nothing in our discussion of their antiquities. Now it is found that the forms of their letters take the shape of animals of every kind, and of the members of the human body, and of implements and especially carpenters' tools; for their writing does not express the intended concept by means of syllables joined one to another, but by means of the significance of the objects which have been copied and by its figurative meaning which has been impressed upon the memory by practice. For instance, they draw the picture of a hawk, a crocodile, a snake, and of the members of the human body—an eye, a hand, a face, and the like. Now the hawk
signifies to them everything which happens swiftly, since this animal is practically the swiftest of winged creatures. And the concept portrayed is then transferred, by the appropriate metaphorical transfer, to all swift things and to everything to which swiftness is appropriate, very much as if they had been named. And the crocodile is a symbol of all that is evil, and the eye is the warder of justice and the guardian of the entire body.  And as for the members of the body, the right hand with fingers extended signifies a procuring of livelihood, and the left with the fingers closed, a keeping and guarding of property.  The same way of reasoning applies also to the remaining characters, which represent parts of the body and implements and all other things; for by paying close attention to the significance which is inherent in each object and by training their minds through drill and exercise of the memory over a long period, they read from habit everything which has been written.

5. As for the customs of the Ethiopians, not a few of them are thought to differ greatly from those of the rest of mankind, this being especially true of those which concern the selection of their kings. The priests, for instance, first choose out the noblest men from their own number, and whichever one from this group the god may select, as he is borne about in a procession in accordance with a certain practice of theirs, him the multitude take for their king; and straightway it both worships and honours him like a god, believing that the sovereignty has been entrusted to him by Divine Providence. And the king who has been thus chosen both follows a regimen which has been fixed in accordance with the laws and performs all his other deeds in accordance with the ancestral custom, according neither favour nor punishment to anyone contrary to the usage which has been approved among them from the beginning. It is also a custom of theirs that the king shall put no one of his subjects to death, not even if a man shall have been condemned to death and is considered deserving of punishment, but that he shall send to the transgressor one of his attendants bearing a token of death; and the guilty person, on seeing the warning, immediately retires to his home and removes himself from life. Moreover, for a man to flee from his own into a neighbouring country and thus by moving away from his native land to pay the penalty of his transgression, as is the custom among the Greeks, is permissible under no circumstances. Consequently, they say, when a man to whom the token of death had been sent by the king once undertook to flee from Ethiopia, and his mother, on learning of this, bound his neck about with her girdle, he dared not so much as raise his hands against her in any way but submitted to be strangled until he died, that he might not leave a greater disgrace to his kinsmen.

6. Of all their customs the most astonishing is that which obtains in connection with the death of their kings. For the priests at Meroe who spend their time in the worship of the gods and the rites which do them honour, being the greatest and most powerful order, whenever the idea comes to them, dispatch a messenger to the king with orders that he die. For the gods, they add, have revealed this to them, and it must be that the command of the immortals should in no wise be disregarded by one of mortal frame. And this order they accompany with other arguments, such as are accepted by a simple-minded nature, which has been bred in a custom that both ancient and difficult to eradicate and which knows no argument that can be set in opposition to commands enforced by no compulsion. Now in former times the kings would obey the priests, having been overcome, not by arms nor by force, but because their reasoning powers had been put under a constraint by their very superstition; but during the reign of the second Ptolemy the king of the Ethiopians, Ergamenes, who had had a Greek education and had studied philosophy, was the  first to have the courage to disdain the command. For assuming a spirit which became the position of a king he entered with his soldiers into the unapproachable place where stood, as it turned out, the golden shrine of the Ethiopians, put the priests to the sword, and after abolishing this custom thereafter ordered affairs after his own will.

7. As for the custom touching the friends of the king, strange as it is, it persists, they said, down to our own time. For the Ethiopians have the custom, they say, that if their king has been maimed in some part of his body through any cause whatever, all his companions suffer the same loss of their own choice; because they consider that it would be a disgraceful thing if, when the king had been maimed in his leg, his friends should be sound of limb, and if in their goings forth from the palace they should not all follow the king limping as he did; for it would be strange that steadfast friendship should share sorrow and grief and bear equally all other things both good and evil, but should have no part in the suffering of the body. They say also that it is customary for the comrades of the kings even to die with them of their own accord and that such a death is an honourable one and a proof of true friendship. And it is for this reason, they add, that a conspiracy against the king is not easily raised among the Ethiopians, all his friends being equally concerned both for his safety and their own. These, then, are the customs which prevail among the Ethiopians who dwell in their capital (Napata) and those who inhabit both the island of Meroe and the land adjoining Egypt.

Diodorus Siculus