Exodus 3:12-13

God said, “I will be with you. This will be the proof that I am sending you: After you lead the people out of Egypt, all of you will worship me on this mountain.” Moses said to God, “When I go to the Israelites, I will say to them, ‘The God of your ancestors sent me to you.’ What if the people say, ‘What is his name?’ What should I tell them?”