Joshua 17:9

9. the coast descended unto the river Kanah, southward of the river—The line which separated the possessions of the two brothers from each other ran to the south of the stream. Thus the river was in the territory of Manasseh; but the cities which were upon the river, though all were within the limits of Manasseh's possessions, were assigned partly to Ephraim, and partly to Manasseh; those on the south side being given to the former; those upon the north to the latter [KEIL]. It appears (Joshua 17:10) that Manasseh was still further interlaced with other neighboring tribes.