Exodus 3:13-15

13And Moses said to God, Behold, when I come to the children of Israel, and shall say to them, The God of your fathers hath sent me to you; and they shall say to me, What is his name? what shall I say to them? 14And God said to Moses, I AM THAT I AM: and he said, Thus shalt thou say to the children of Israel, I AM hath sent me to you. 15And God said moreover to Moses, Thus shalt thou say to the children of Israel, The LORD God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, hath sent me to you: this is my name for ever, and this is my memorial to all generations.