Exodus 3:2-5

²The angel of Yahweh appeared to him in a flame of fire out of the midst of a bush. He looked, and behold, the bush burned with fire, and the bush was not consumed. ³Moses said, I will turn aside now, and see this great sight, why the bush is not burnt. ⁴When Yahweh saw that he turned aside to see, God called to him out of the midst of the bush, and said, "Moses! Moses!" He said, "Here I am." ⁵He said, "Don`t come close. Take off your sandals from off your feet, for the place you are standing on is holy ground."