Exodus 3 :10-14
10 So now, go. I am sending you to Pharaoh to bring my people the Israelites out of Egypt.” 11 But Moses said to God, “Who am I that I should go to Pharaoh and bring the Israelites out of Egypt?” 12 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.” 13 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?” 14 God 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.’ ”