Genesis 18:26-30

²⁶So the Lord said, “If I find in Sodom fifty righteous within the city, then I will spare the entire place on their account.” ²⁷And Abraham replied, “Now behold, I have ventured to speak to the Lord, although I am only dust and ashes. ²⁸Suppose the fifty righteous are lacking five, will You destroy the entire city because of five?” And He said, “I will not destroy it if I find forty-five there.” ²⁹And he spoke to Him yet again and said, “Suppose forty are found there?” And He said, “I will not do it on account of the forty.” ³⁰Then he said, “Oh may the Lord not be angry, and I shall speak; suppose thirty are found there?” And He said, “I will not do it if I find thirty there.”