Manasseh had the land of Tappuah, but Tappuah on the border of Manasseh belonged to the children of Ephraim.
Joshua 17:8
Surrounding context
17:7 And the territory of Manasseh was from Asher to Michmethath, that lies east of Shechem; and the border went along south to the inhabitants of En Tappuah.
17:8 Manasseh had the land of Tappuah, but Tappuah on the border of Manasseh belonged to the children of Ephraim.
17:9 And the border descended to the Brook Kanah, southward to the brook. These cities of Ephraim are among the cities of Manasseh. The border of Manasseh was on the north side of the brook; and it ended at the sea.