Exodus 3:10-14

10Come, I will send you to Pharaoh that you may bring my people, the children of Israel, out of Egypt."

11But Moses said to God, "Who am I that I should go to Pharaoh and bring the children of Israel out of Egypt?"

12He said, "But I will be with you, and this shall be the sign for you, that I have sent you: when you have brought the people out of Egypt, you shall serve God on this mountain."

13Then Moses said to God, "If I come to the people of Israel and say to them, 'The God of your fathers has sent me to you,' and they ask me, 'What is his name?' what shall I say to them?"

14God said to Moses, "I am who I am." And he said, "Say this to the people of Israel: 'I am has sent me to you.'"