Exodus 3:13-14

13Moses said to God, “Suppose I go to the Israelites and say to them, ‘The God of your fathers has sent me to you,’ and they ask me, ‘What is his name?’ Then what shall I tell them?”

14God said to Moses, “ I AM WHO I AM . Or I will be what I will be This is what you are to say to the Israelites: ‘ I AM has sent me to you.’ ”