Genesis 14:21-23

21The king of Sodom said to Abram, “Give me the people and keep the goods for yourself.” 22But Abram said to the king of Sodom, “With raised hand I have sworn an oath to the LORD, God Most High, Creator of heaven and earth, 23that I will accept nothing belonging to you, not even a thread or the strap of a sandal, so that you will never be able to say, ‘I made Abram rich.’