Genesis 18:30-34

Then 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.”

And he said, “Now behold, I have ventured to speak to the Lord; suppose twenty are found there?” And He said, “I will not destroy it on account of the twenty.”

Then he said, “Oh may the Lord not be angry, and I shall speak only this once: suppose ten are found there?” And He said, “I will not destroy it on account of the ten.”

As soon as He had finished speaking to Abraham the Lord departed, and Abraham returned to his place.