Genesis 15:2

15:2 But Abram said, “O sovereign Lord, what will you give me since I continue to be childless, and my heir is Eliezer of Damascus?”

Genesis 18:30-32

18:30 Then Abraham said, “May the Lord not be angry so that I may speak! What if thirty are found there?” He replied, “I will not do it if I find thirty there.”

18:31 Abraham said, “Since I have undertaken to speak to the Lord, what if only twenty are found there?” He replied, “I will not destroy it for the sake of the twenty.”

18:32 Finally Abraham said, “May the Lord not be angry so that I may speak just once more. What if ten are found there?” He replied, “I will not destroy it for the sake of the ten.”