Genesis 18:32

Peradventure ten shall be found there.

Knowing that in the family of Lot. knowledge of the true religion had been taught, and probably ignorant of how that family, and especially his sons-in-law and married daughters, had become demoralized by residence in Sodom, he could not suppose that there were less than ten righteous persons in Sodom, and hence he carried the supplications no farther. He was mistaken. The treatment of the two men (angels) in Sodom is recorded, in order to teach the world the utter vileness of the city, and to justify the ways of God to men.