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

[14] Corah, a Hebrew of principal account, both by his family and by his wealth, one that was also able to speak well, and one that could easily persuade the people by his speeches, saw that Moses was in an exceeding great dignity, and was at it, and envied him on that account, (he of the same tribe with Moses, and of kin to him,) was particularly grieved, because he thought he better deserved that honorable post on account of great riches, and not inferior to him in his birth. So he raised a clamor against him among the Levites, who were of the same tribe, and among his kindred, saying, "That it was a very sad thing that they should overlook Moses, while hunted after and paved the way to glory for himself, and by ill arts should obtain it, under the pretense of God's command, while, contrary to laws, he had given the priesthood to Aaron, the common suffrage of the multitude, but by his own vote, as bestowing dignities in a way on whom he pleased." He added, "That this concealed way of imposing on them was harder to be borne than if it had been done by an open force upon them, because he did now not only their power without their consent, but even they were unapprised of his contrivances against them; for whosoever is conscious to himself that he deserves any dignity, aims to get it by persuasion, and not by an arrogant method of violence; those that believe it impossible to obtain honors justly, make a show of goodness, and do not introduce force, but by cunning tricks grow wickedly powerful. That it was proper for the multitude to punish such men, even while they think themselves concealed in their designs, and not suffer them to gain strength till they have them for their open enemies. For what account," added he, "is Moses able to give, why he has bestowed the priesthood on Aaron and his sons? for if God had determined to bestow that honor on one of the tribe of Levi, I am more worthy of it than he is; I myself being equal to Moses by my family, and superior to him both in riches and in age: but if God had determined to bestow it on the eldest be, that of Reuben might have it most justly; and then Dathan, and Abiram, and [On, the son of] Peleth, would have it; for these are the oldest men of that tribe, and potent on account of their great wealth also."