And now, behold, the children of Ammon and Moab and mount Seir, whom thou wouldest not let Israel invade, when they came out of the land of Egypt, but they turned from them, and destroyed them not; (2 Chronicles 20:10)
This expression seems to be parallel to the Mehunim (Meunites, RSV) of v. 1 (see comments there).
Wouldest not let.
See Deut. 2:4, 5, 9, 19; also Num. 20:14-21. Israel was commanded to spare the Edomites (see on 2 Chron. 20:2), for they were the children of Esau, and the Moabites and the Ammonites, for they were the children of Lot.