Exodus 3:11-14

But Moses asked God, “Who am I that I should go to Pharaoh and that I should bring the Israelites out of Egypt?” He answered, “I will certainly be with you, and this will be the sign to you that I am the one who sent you: when you bring the people out of Egypt, you will all worship God at this mountain.” Then Moses asked God, “If I go to the Israelites and say to them, ‘The God of your ancestors 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.”