Genesis 18:20-26

And the LORD said, “Because the outcry against Sodom and Gomorrah is great, and because their sin is very grave, I will go down now and see whether they have done altogether according to the outcry against it that has come to Me; and if not, I will know.” Then the men turned away from there and went toward Sodom, but Abraham still stood before the LORD. And Abraham came near and said, “Would You also destroy the righteous with the wicked? Suppose there were fifty righteous within the city; would You also destroy the place and not spare it for the fifty righteous that were in it? Far be it from You to do such a thing as this, to slay the righteous with the wicked, so that the righteous should be as the wicked; far be it from You! Shall not the Judge of all the earth do right?” So the LORD said, “If I find in Sodom fifty righteous within the city, then I will spare all the place for their sakes.”