There the angel of the LORD appeared to him in flames of fire from within a bush. Moses saw that though the bush was on fire it did not burn up.
References for Exodus 3:2
So Moses thought, “I will go over and see this strange sight—why the bush does not burn up.”
When the LORD saw that he had gone over to look, God called to him from within the bush, “Moses! Moses!” And Moses said, “Here I am.”
References for Exodus 3:4
“Do not come any closer,” God said. “Take off your sandals, for the place where you are standing is holy ground.”
References for Exodus 3:5
Then he said, “I am the God of your father, the God of Abraham, the God of Isaac and the God of Jacob.” At this, Moses hid his face, because he was afraid to look at God.
References for Exodus 3:6