Evidently Joshua acted in this adjuration, under the immediate influence of the Spirit of the Lord. The event proves it, for in after ages, when Hial, the Bethelite, built Jericho, what Joshua had predicted came to pass: see 1 Kings 16:34.
Related Commentaries of Joshua 6:26
Joshua 6:26
26 And Joshua adjured them at that time, saying, Cursed be the man before the LORD, that riseth up and buildeth this city Jericho: he shall lay the foundation thereof in his firstborn, and in his youngest son shall he set up the gates of it.