Genesis 18:30-32

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.”