Joshua 5:13-15

13While Joshua was near Jericho, a man appeared to him. Joshua looked up and there he was! He stood in front of Joshua with a sword in his hand. Joshua went towards him. He asked the man, ‘Are you here to help us, or to help our enemies?’

14The man answered, ‘Neither. I am the captain of the Lord's army. Now I am here!’ Joshua fell on the ground to worship the man and he said, ‘Sir, I am your servant. Tell me what I should do.’

15The captain of the Lord's army said, ‘Remove your shoes from your feet. You are standing on holy ground.’ Joshua did that.