Exodus 3:11-13

But Moses said to God, ‘Who am I that I should go to Pharaoh and bring the Israelites out of Egypt?’ And God said, ‘I will be with you. And this will be the sign to you that it is I who have sent you: when you have brought the people out of Egypt, you will worship God on this mountain.’ Moses said to God, ‘Suppose 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?” Then what shall I tell them?’