Judges 3:26-28

26And Ehud escaped while they tarried, and passed beyond the quarries, and escaped unto Seirath.

27And it came to pass, when he was come, that he blew a trumpet in the mountain of Ephraim, and the children of Israel went down with him from the mount, and he before them.

28And he said unto them, Follow after me: for the Lord hath delivered your enemies the Moabites into your hand. And they went down after him, and took the fords of Jordan toward Moab, and suffered not a man to pass over.