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.