Exodus 3:4-6

When the LORD saw Moses was coming to look at the bush, God called to him from the bush, “Moses, Moses!” And Moses said, “Here I am.” Then God said, “Do not come any closer. Take off your sandals, because you are standing on holy ground. I am the God of your ancestors—the God of Abraham, the God of Isaac, and the God of Jacob.” Moses covered his face because he was afraid to look at God.