Genesis 18:29

Again he spoke to him and said , Suppose forty are found there . He answered , For the sake of forty I will not do it.

Once again he spoke to him, “What if only forty are found there?” He said, “For the sake of forty, I will not do it.”

And he spake unto him yet again, and said, Peradventure there shall be forty found there. And he said, I will not do it for forty's sake.