Joshua 13:29

“And Moses gave [inheritance] unto the half tribe of Manasseh, etc.] Whether at their request or of himself, there being land enough for them, and the two tribes of Gad and Reuben, is not certain: and [this] is [the possession] of the half tribe of Manasseh, by their families; which is after related and described.”

“The writer appends to the command of God Joshua 13:1-7 a statement that the other two tribes and a half had already had their inheritance marked out for them by Moses in the land east of Jordan. The boundaries of this territory as a whole are first set forth Joshua 13:8-14, and afterward the portions assigned within it to the two tribes and a half are severally described Joshua 13:15-33. Joshua 13:14 See Deuteronomy 18:1-5 and notes. Joshua 13:15-24 Inheritance of the tribe of Reuben. This territory was the most southerly of the trans-Jordanic possessions of Israel, and adjoined Moab, which lay only on the other side of the Arnon. Hence, the Reubenites became in after times much intermixed…”

“Of Manasseh - Not that thou desired it, as Reuben and Gad did, Num 32:1, but partly as a recompence to Machir the Manassite, for his valiant acts against Og; and partly for the better defence of the other two tribes, by so considerable an accession to them, which also was without any inconvenience to them, because the country was too large for the two tribes of Reuben and Gad. Joshua 13:30”

“13:29-33 Manasseh was Joseph’s elder son. Jacob gave Joseph’s sons each a full inheritance, thus giving Joseph a double portion of the birthright (see 14:4).”

“The territory of the half tribe of Manasseh extended from Mahanaim onwards, and embraced all Bashan, with the sixty Jair towns and the (northern) half of Gilead (see the comm. on Deu 3:13-15). Joshua 13:32”