Genesis 18:29

26 Yahweh said, "If I find in Sodom fifty righteous within the city, then I will spare all the place for their sake."

27 Abraham answered, "See now, I have taken it on myself to speak to the Lord, who am but dust and ashes.

28 What if there will lack five of the fifty righteous? Will you destroy all the city for lack of five?" He said, "I will not destroy it, if I find forty-five there."

29 He spoke to him yet again, and said, "What if there are forty found there?" He said, "I will not do it for the forty`s sake."

30 He said, "Oh don`t let the Lord be angry, and I will speak. What if there are thirty found there?" He said, "I will not do it, if I find thirty there."

31 He said, "See now, I have taken it on myself to speak to the Lord. What if there are twenty found there?" He said, "I will not destroy it for the twenty`s sake."

32 He said, "Oh don`t let the Lord be angry, and I will speak yet but this once. What if ten are found there?" He said, "I will not destroy it for the ten`s sake."