Exodus 3:13-14
13Then Moses said to God, “Behold, I am about to come to the sons of Israel, and I will say to them, ‘The God of your fathers has sent me to you.’ And they will say to me, ‘What is His name?’ What shall I say to them?” 14And God said to Moses, “1,aI AM WHO 2I AM”; and He said, “Thus you shall say to the sons of Israel, ‘3I AM has sent me to you.’”