Then Moses asked God, "If 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?' what should I tell them?"
God replied to Moses, "I AM WHO I AM. This is what you are to say to the Israelites: I AM has sent me to you."
References for Exodus 3:14
God also said to Moses, "Say this to the Israelites: Yahweh, the God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, has sent me to you. This is My name forever; this is how I am to be remembered in every generation.