Genesis 18:27, 30-32

Then Abraham spoke again. “Since I have begun, let me speak further to my Lord, even though I am but dust and ashes.

“Please don’t be angry, my Lord,” Abraham pleaded. “Let me speak—suppose only thirty righteous people are found?” And the LORD replied, “I will not destroy it if I find thirty.” Then Abraham said, “Since I have dared to speak to the Lord, let me continue—suppose there are only twenty?” And the LORD replied, “Then I will not destroy it for the sake of the twenty.” Finally, Abraham said, “Lord, please don’t be angry with me if I speak one more time. Suppose only ten are found there?” And the LORD replied, “Then I will not destroy it for the sake of the ten.”