Joshua 6:1-2

Jericho was straitly shut up They had shut up all their gates, and kept a very strict guard at them, for fear of the children of Israel. And the Lord said unto Joshua There is great reason to believe, and indeed most commentators agree, that this was spoken by the divine person who is said in the preceding chapter to have appeared to Joshua in the form of a man, but who styled himself captain of the host of the Lord, and is here called Jehovah, which shows that he was not of the angelic order. It is probable that the king and people of Jericho had refused the offers of peace which God ordered to be first sent to every city before they besieged it, Deuteronomy 20:10; and, trusting to their forces, had taken up a desperate resolution not to yield on any terms.