There was also a lot for the tribe of Manasseh, namely, that east of Jordan, which has already been described several times; for he was the first-born of Joseph; to wit, for Machir, the first-born of Manasseh, the father of Gilead; because he was a man of war, therefore he had Gilead and Bashan. Deuteronomy 3:15. Since Manasseh was the first-born of Joseph, therefore his descendants, in whom the rights of Joseph were vested, received not only a portion in the conquered territory of Og, but also a lot in Canaan proper.
Related Commentaries of Joshua 17:1
Joshua 17:1
1 There was also a lot for the tribe of Manasseh; for he was the firstborn of Joseph; to wit, for Machir the firstborn of Manasseh, the father of Gilead: because he was a man of war, therefore he had Gilead and Bashan.