Genesis 14:22-23

But Abram said, “I made a strong promise to my God. His name is Yahweh. He is more powerful than any other god, and he made heaven and earth. I promised that I will not take anything that belongs to you. I will not even take a bit of string, or anything that belongs to you. You see, I don’t want you to tell everyone that you gave me a lot of things and made me rich.