Deuteronomy 3:16

16 and I gave to the Reubenites and Gadites [the area extending] from Gilead to the Arnon Valley (the middle of the valley was the border) and up to the Jabbok River, the border of the Ammonites.

Deuteronomy 3:16 Meaning and Commentary

Deuteronomy 3:16

And unto the Reubenites, and unto the Gadites
The tribes of Reuben and Gad:

I gave from Gilead even unto the river Arnon:
see ( Deuteronomy 3:12 )

half the valley and the border;
or rather half the river, the river Arnon; and so it is rendered "the middle of the river", in ( Joshua 12:2 ) and so here the middle of the torrent by the Vulgate Latin and Septuagint versions, and by Onkelos:

even unto the river Jabbok, which is the border of the children of
Ammon;
beyond which the land given to the tribes of Reuben and Gad reached not; see ( Deuteronomy 2:37 ) .

Deuteronomy 3:16 In-Context

14 Jair, a descendant of Manasseh, took over the entire region of Argob as far as the border of the Geshurites and Maacathites. He called Bashan by his own name, Jair's Villages, as it is today.

15 I gave Gilead to Machir,

16 and I gave to the Reubenites and Gadites [the area extending] from Gilead to the Arnon Valley (the middle of the valley was the border) and up to the Jabbok River, the border of the Ammonites.

17 The Arabah and Jordan are also borders from Chinnereth as far as the Sea of the Arabah, the Dead Sea, under the slopes of Pisgah on the east.

18 "I commanded you at that time: The Lord your God has given you this land to possess. All your fighting men will cross over in battle formation ahead of your brothers the Israelites.