Exodus 3:12-15

And God said, “Certainly I will be with you, and this shall be the sign to you that it is I who have sent you: when you have brought the people out of Egypt, you shall serve and worship God at this mountain.” Then Moses said to God, “Behold, when I come to the Israelites and say to them, ‘The God of your fathers (ancestors) has sent me to you,’ and they say to me, ‘What is His name?’ What shall I say to them?” God said to Moses, “I AM WHO I AM”; and He said, “You shall say this to the Israelites, ‘I AM has sent me to you.’ ” Then God also said to Moses, “This is what you shall say to the Israelites, ‘The LORD, the God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob (Israel), has sent me to you.’ This is My Name forever, and this is My memorial [name] to all generations.