Exodus 3:2

3:2 The angel of the Lord appeared to him in a flame of fire from within a bush. He looked – and the bush was ablaze with fire, but it was not being consumed!

Exodus 3:6

3:6 He added, “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, because he was afraid to look at God.