When Ptolemy king of Egypt formed a library, and endeavored to collect the writings of all men, he heard also of these prophets, and sent to Herod, who was at that time king of the Jews, requesting that the books of the prophets be sent to him. And Herod the king did indeed send them, written, as they were, in the foresaid Hebrew language. And when their contents were found to be unintelligible to the Egyptians, he again sent and requested that men be commissioned to translate them into the Greek language. And when this was done, the books remained with the Egyptians, where they are until now. They are also in the possession of all Jews throughout the world.
Ptolemy, king of Egypt, when he had built the library in Alexandria, and by gathering books from every quarter had filled it, then learnt that very ancient histories written in Hebrew happened to be carefully preserved; and wishing to know their contents, he sent for seventy wise men from Jerusalem, who were acquainted with both the Greek and Hebrew language, and appointed them to translate the books; and that in freedom from all disturbance they might the more speedily complete the translation, he ordered that there should be constructed, not in the city itself, but seven stadia off…and ordered those officers who were appointed to this duty, to afford them all attendance, but to prevent communication with one another, in order that the accuracy of the translation might be discernible even by their agreement. And when he ascertained that the seventy men had not only given the same meaning, but had employed the same words, and had failed in agreement with one another not even to the extent of one word; but had written the same things, and concerning the same things, he was struck with amazement, and believed that the translation had been written by divine power, and perceived that the men were worthy of all honor, as beloved of God; and with many gifts ordered them to return to their own country. And having, as was natural, marveled at the books, and concluded them to be divine, he consecrated them in that library. These things, you men of Greece, are no fable, nor do we narrate fictions; but we ourselves having been in Alexandria, saw the remains of the little cots at the Pharos still preserved, and having heard these things from the inhabitants, who had received them as part of their country’s tradition, we now tell to you what you can also learn from others, and specially from those wise and esteemed men who have written of these things, Philo and Josephus. -ibid
God, then, was made man, and the Lord did Himself save us, giving us the token of the Virgin. But not as some allege, among those now presuming to expound the Scripture, [thus:] “Behold, a young woman shall conceive, and bring forth a son,” as Theodotion the Ephesian has interpreted, and Aquila of Pontus, both Jewish proselytes… For before the Romans possessed their kingdom, while as yet the Macedonians held Asia, Ptolemy the son of Lagus, being anxious to adorn the library which he had founded in Alexandria, with a collection of the writings of all men, which were [works] of merit, made request to the people of Jerusalem, that they should have their Scriptures translated into the Greek language. And they – for at that time they were still subject to the Macedonians – sent to Ptolemy seventy of their elders, who were thoroughly skilled in the Scriptures and in both the languages, to carry out what he had desired. But he, wishing to test them individually, and fearing lest they might perchance, by taking counsel together, conceal the truth in the Scriptures, by their interpretation, separated them from each other, and commanded them all to write the same translation. He did this with respect to all the books. But when they came together in the same place before Ptolemy, and each of them compared his own interpretation with that of every other, God was indeed glorified, and the Scriptures were acknowledged as truly divine. For all of them read out the common translation [which they had prepared] in the very same words and the very same names, from beginning to end, so that even the Gentiles present perceived that the Scriptures had been interpreted by the inspiration of God.
For the apostles, since they are of more ancient date than all these [heretics], agree with this aforesaid translation [of the Septuagint]; and the translation harmonizes with the tradition of the apostles. For Peter, and John, and Matthew, and Paul, and the rest successively, as well as their followers, did set forth all prophetical [announce-merits], just as the interpretation of the elders contains them. -ibid
Clement of Alexandria:
Wherefore also the Scriptures were translated into the language of the Greeks, in order that they might never be able to allege the excuse of ignorance, inasmuch as they are able to hear also what we have in our hands, if they only wish.
It is said that the Scriptures both of the law and of the prophets were translated from the dialect of the Hebrews into the Greek language in the reign of Ptolemy the son of Lagos, or, according to others, of Ptolemy surnamed Philadelphus… For the Macedonians being still in possession of Asia, and the king being ambitious of adorning the library he had at Alexandria with all writings, desired the people of Jerusalem to translate the prophecies they possessed into the Greek dialect. And they being the subjects of the Macedonians, selected from those of highest character among them seventy elders, versed in the Scriptures, and skilled in the Greek dialect, and sent them to him with the divine books. And each having severally translated each prophetic book, and all the translations being compared together, they agreed both in meaning and expression. For it was the counsel of God carried out for the benefit of Grecian ears. It was not alien to the inspiration of God, who gave the prophecy, also to produce the translation, and make it as it were Greek prophecy. -ibid
But that the understanding of their books might not be wanting, this also the Jews supplied to Ptolemy; for they gave him seventy-two interpreters…The same account is given by Aristaeus. So the king left these works unlocked to all, in the Greek language. To this day, at the temple of Serapis, the libraries of Ptolemy are to be seen, with the identical Hebrew originals in them. The Jews, too, read them publicly.