Genesis 18:19-21

19: For I know him, that he will command his children and his household after him, and they shall keep the way of the Lord, to do justice and judgment; that the Lord may bring upon Abraham that which he hath spoken of him.

20: And the Lord said, Because the cry of Sodom and Gomorrah is great, and because their sin is very grievous;

21: I will go down now, and see whether they have done altogether according to the cry of it, which is come unto me; and if not, I will know.