Exodus 3:12-14

12And 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.”

13Moses 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?”

14God said to Moses, “I am who I am. This is what you are to say to the Israelites: ‘I am has sent me to you.’ ”