Exodus 3:6; Exodus 3:13

6 He said also, "I am the God of your father, the God of Abraham, the God of Isaac, and the God of Jacob." Then Moses hid his face, for he was afraid to look at God.

13 Then Moses said to God, "Behold, I am going to the sons of Israel, and I will say to them, 'The God of your fathers has sent me to you.' Now they may say to me, 'What is His name?' What shall I say to them?"