Genesis 18:20-24

And the Lord said, “The outcry of Sodom and Gomorrah is indeed great, and their sin is exceedingly grave.

I will go down now and see whether they have done entirely as the outcry, which has come to Me indicates; and if not, I will know.” Abraham Appeals for Sodom

Then the men turned away from there and went toward Sodom, while Abraham was still standing before the Lord.

Abraham approached and said, “Will You indeed sweep away the righteous with the wicked?

Suppose there are fifty righteous people within the city; will You indeed sweep it away and not spare the place for the sake of the fifty righteous who are in it?