Josh 5:13-15

13 Once when Joshua was by Jericho, he looked up and saw a man standing before him with a drawn sword in his hand. Joshua went to him and said to him, “Are you one of us, or one of our adversaries?” 14 He replied, “Neither; but as commander of the army of the Lord I have now come.” And Joshua fell on his face to the earth and worshiped, and he said to him, “What do you command your servant, my lord?” 15 The commander of the army of the Lord said to Joshua, “Remove the sandals from your feet, for the place where you stand is holy.” And Joshua did so.