Genesis 18:26-33

And the LORD said, “If I find at Sodom fifty righteous in the city, I will spare the whole place for their sake.” Abraham answered and said, “Behold, I have undertaken to speak to the Lord, I who am but dust and ashes. Suppose five of the fifty righteous are lacking. Will you destroy the whole city for lack of five?” And he said, “I will not destroy it if I find forty-five there.” Again he spoke to him and said, “Suppose forty are found there.” He answered, “For the sake of forty I will not do it.” Then he said, “Oh let not the Lord be angry, and I will speak. Suppose thirty are found there.” He answered, “I will not do it, if I find thirty there.” He said, “Behold, I have undertaken to speak to the Lord. Suppose twenty are found there.” He answered, “For the sake of twenty I will not destroy it.” Then he said, “Oh let not the Lord be angry, and I will speak again but this once. Suppose ten are found there.” He answered, “For the sake of ten I will not destroy it.” And the LORD went his way, when he had finished speaking to Abraham, and Abraham returned to his place.