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

[331] When Jacob had made these appointments all the day, and night came on, he moved on with his company; and, as they were gone over a certain river called Jabboc, Jacob was left behind; and meeting with an angel, he wrestled with him, the angel beginning the struggle: but he prevailed over the angel, who used a voice, and spake to him in words, exhorting him to be pleased with what had happened to him, and not to suppose that his victory was a small one, but that he had overcome a divine angel, and to esteem the victory as a sign of great blessings that should come to him, and that his offspring should never fall, and that no man should be too hard for his power. He also commanded him to be called Israel, which in the Hebrew tongue signifies one that struggled with the divine angel.¹ These promises were made at the prayer of Jacob; for when he perceived him to be the angel of God, he desired he would signify to him what should befall him hereafter. And when the angel had said what is before related, he disappeared; but Jacob was pleased with these things, and named the place Phanuel, which signifies, the face of God. Now when he felt pain, by this struggling, upon his broad sinew, he abstained from eating that sinew himself afterward; and for his sake it is still not eaten by us.