Exodus 3:11-13

11But Moses said to God, ‘I am not an important person. I cannot go to Pharaoh. I cannot lead the Israelites out of Egypt!’

12God said to Moses, ‘Be sure of this: I will be with you. After you have led the people out of Egypt you will all worship me here, on this mountain. That will show you that I myself have sent you to do this.’

13Then Moses said to God, ‘If I go to the Israelites, they may not believe me. I will say, “The God that your ancestors worshipped has sent me to you.” But then they will ask me, “What is his name?” Then what will I say to them?’