Exodus 3:13-14

13Then Moses said to God, ‘If I go to the Israelites, they may not believe me. I will say, “The God that your ancestors worshipped has sent me to you.” But then they will ask me, “What is his name?” Then what will I say to them?’

14God said to Moses, ‘I am who I am! Say this to the Israelite people: “I AM has sent me to you.” ’