Exodus 3:1–2

1 Now Moses was keeping the flock of his father-in-law, Jethro, the priest of Midian; and he led his flock to the west side of the wilderness, and came to Horeb, the mountain of God. 2 And the angel of the Lord appeared to him in a flame of fire out of the midst of a bush; and he looked, and lo, the bush was burning, yet it was not consumed.