'Sandals' in the Bible

But the Lord said to him, 'Take the sandals off your feet, for the place where you are standing is holy ground.

The angel said to him, "Fasten your belt and put on your sandals." Peter did so. Then the angel said to him, "Put on your cloak and follow me."

But while John was completing his mission, he said repeatedly, 'What do you think I am? I am not he. But look, one is coming after me. I am not worthy to untie the sandals on his feet!'