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

[199] When Abraham heard this, he was grieved for the Sodomites; and he rose up, and besought God for them, and entreated him that he would not destroy the righteous with the wicked. And when God had replied that there was no good man among the Sodomites; for if there were but ten such man among them, he would not punish any of them for their sins, Abraham held his peace. And the angels came to the city of the Sodomites, and Lot entreated them to accept of a lodging with him; for he was a very generous and hospitable man, and one that had learned to imitate the goodness of Abraham. Now when the Sodomites saw the young men to be of beautiful countenances, and this to an extraordinary degree, and that they took up their lodgings with Lot, they resolved themselves to enjoy these beautiful boys by force and violence; and when Lot exhorted them to sobriety, and not to offer any thing immodest to the strangers, but to have regard to their lodging in his house; and promised that if their inclinations could not be governed, he would expose his daughters to their lust, instead of these strangers; neither thus were they made ashamed.