Exodus 3:1-2, 4

Moses was shepherding the flock of Jethro, his father-in-law, the priest of Midian. He led the flock to the west end of the wilderness and came to the mountain of God, Horeb. The angel of GOD appeared to him in flames of fire blazing out of the middle of a bush. He looked. The bush was blazing away but it didn’t burn up.

GOD saw that he had stopped to look. God called to him from out of the bush, “Moses! Moses!” He said, “Yes? I’m right here!”