Exodus 3:13-15

13But Moses said to God, “Suppose I go to Bnei-Yisrael and say to them, ‘The God of your fathers has sent me to you,’ and they ask me, ‘What is His Name?’ What should I say to them?”

14God answered Moses, “I AM WHO I AM. ” Then He said, “You are to say to Bnei-Yisrael, ‘I AM’ has sent me to you.”

15God also said to Moses: “You are to say to Bnei-Yisrael, Adonai, the God of your fathers, the God of Abraham, Isaac and Jacob, has sent me to you. This is My Name forever, and the Name by which I should be remembered from generation to generation.