I will open the side - קתף ketheph, the shoulder, the strongest frontier place. Beth-jeshimoth, Baal-meon, and Kiriathaim were strong frontier towns of Moab.
I will open the side - i. e., lay it open to the attack of the enemy from the cities, from his cities, from his frontier (or, in every quarter). There is an ironical stress on “his” cities, because these cities belonged not to Moab but to Israel, having been assigned to the Reubenites Numbers 32:38; Joshua 13:20. They lay to the north of the river Arnon, which was the proper boundary of Moab Numbers 21:13. The Moabites had in the last days of the kingdom of Israel recovered this territory Isaiah 16:1-14. They still occupied this land in the time of Ezekiel (see Numbers 22:39, Numbers 22:41. Baal-meon occurs on the Moabitic stone as a place which Mesa built or fortified. He probably erected a stronghold on the old locality, reviving the ancient name. Beth-jeshimoth is identified with a knoll at the northeasternmost point of the Dead Sea.