Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[327] Now Moses lived in all one hundred and twenty years; a third part of which time, abating one month, he was the people's ruler; and he died on the last month of the year, which is called by the Macedonians Dystrus, but by us Adar, on the first day of the month. He was one that exceeded all men that ever were in understanding, and made the best use of what that understanding suggested to him. He had a very graceful way of speaking and addressing himself to the multitude; and as to his other qualifications, he had such a full command of his passions, as if he hardly had any such in his soul, and only knew them by their names, as rather perceiving them in other men than in himself. He was also such a general of an army as is seldom seen, as well as such a prophet as was never known, and this to such a degree, that whatsoever he pronounced, you would think you heard the voice of God himself. So the people mourned for him thirty days: nor did ever any grief so deeply affect the Hebrews as did this upon the death of Moses: nor were those that had experienced his conduct the only persons that desired him, but those also that perused the laws he left behind him had a strong desire after him, and by them gathered the extraordinary virtue he was master of. And this shall suffice for the declaration of the manner of the death of Moses.