As part of Moab passed into Sihon's possession so did a part of Ammon fall into Og's hands, and because Israel had appropriated these land, the Moabites feared they would filch from them all their land. In great alarm they therefore gathered together in their fastnesses, in which they knew themselves to be safe from Israel's attacks. Their fear was in reality quite without foundation, for Israel never dreamed of transgressing God's command by waging war upon Lot's descendants. They might without compunction keep the former provinces of Moab and Ammon because they took them not from these, but from Sihon and Og, who had captured them.