Genesis 18:23-32

Abraham stepped forward and said, “Will you really sweep away the righteous with the wicked? What if there are fifty righteous people in the city? Will you really sweep it away instead of sparing the place for the sake of the fifty righteous people who are in it? You could not possibly do such a thing: to kill the righteous with the wicked, treating the righteous and the wicked alike. You could not possibly do that! Won’t the Judge of the whole earth do what is just?” The LORD said, “If I find fifty righteous people in the city of Sodom, I will spare the whole place for their sake.” Then Abraham answered, “Since I have ventured to speak to my lord — even though I am dust and ashes —  suppose the fifty righteous lack five. Will you destroy the whole city for lack of five?” He replied, “I will not destroy it if I find forty-five there.” Then he spoke to him again, “Suppose forty are found there?” He answered, “I will not do it on account of forty.” Then he said, “Let my lord not be angry, and I will speak further. Suppose thirty are found there?” He answered, “I will not do it if I find thirty there.” Then he said, “Since I have ventured to speak to my lord, suppose twenty are found there?” He replied, “I will not destroy it on account of twenty.” Then he said, “Let my lord not be angry, and I will speak one more time. Suppose ten are found there?” He answered, “I will not destroy it on account of ten.”