half the land] To wit, which Sihon had taken from them, as appeareth Numbers 21:26. for otherwise God had expresly forbidden the Israelites to take any thing from the Ammonites which was in their present possession, Deuteronomy 2:19. Hence it is, that Jephthah denieth that they had taken any thing from them, but from Sihon, Judg. 11. 15.