Exodus 3

13 Moses said to God, "Behold, when I come to the children of Israel, and tell them, ‘The God of your fathers has sent me to you,’ and they ask me, ‘What is his name?’ what should I tell them?"

14 God said to Moses, "I AM WHO I AM," and he said, "You shall tell the children of Israel this: ‘I AM has sent me to you.’"