Joshua 5:13-15 NIV

[13] Now when Joshua was near Jericho, he looked up and saw a man standing in front of him with a drawn sword in his hand. Joshua went up to him and asked, “Are you for us or for our enemies?” [14] “Neither,” he replied, “but as commander of the army of the LORD I have now come.” Then Joshua fell facedown to the ground in reverence, and asked him, “What message does my Lord have for his servant?” [15] The commander of the LORD’s army replied, “Take off your sandals, for the place where you are standing is holy.” And Joshua did so.