Genesis 18:30-32
30
Then he said, “May the Lord not be angry, but let me speak. What if only thirty can be found there?”
He answered, “I will not do it if I find thirty there.”
31
Abraham said, “Now that I have been so bold as to speak to the Lord, what if only twenty can be found there?”
He said, “For the sake of twenty, I will not destroy it.”
32
Then he said, “May the Lord not be angry, but let me speak just once more. What if only ten can be found there?”
He answered, “For the sake of ten, I will not destroy it.”