Exodus 3:5

5Then he said, “Do not come near; atake your sandals off your feet, for the place on which you are standing is holy ground.”

Acts 7:32-33

32 bI am the God of your fathers, the God of Abraham and of Isaac and of Jacob.’ And Moses trembled and did not dare to look. 33Then the Lord said to him, cTake off the sandals from your feet, for the place where you are standing is holy ground.

2 Peter 1:18

18we ourselves heard this very voice borne from heaven, for we were with him on dthe holy mountain.
Copyright information for ESV