Jamieson-Fausset-Brown on Numbers 34:13
The two tribes and the half-tribe have received their inheritance on this side Jordan--The conquered territories of Sihon and Og, lying between the Arnon and mount Hermon, were allotted to them--that of Reuben in the most southerly part, Gad north of it, and the half Manasseh in the northernmost portion.
John Gill on Numbers 34:15
The two tribes and the half tribe,.... The tribes of Reuben and Gad, and the half tribe of Manasseh:
have received their inheritance on this side Jordan near Jericho, eastward, toward the sun rising; that is, they received the grant of it there, even in the plains of Moab, opposite Jericho, which lay to the east of the land of Canaan.
John Calvin on Numbers 34:13-15
And Moses commanded the children of Israel. Though this is a repetition, yet it is not a superfluous one; for he contrasts the new allotment of the nine tribes and a half with the former grant; [229] for the exception, which is immediately added, as to the lands beyond Jordan, given to the Reubenites, and Gadites, and half tribe of Manasseh, does not exclude them from their part of the promised inheritance was if they were disinherited, and therefore banished beyond the boundaries prescribed by God -- but only from being subject to the casting of lots, because they had by special privilege obtained from their brethren what would else have been included in the common inheritance. Not that thi…
Read the whole note in the consoleKeil & Delitzsch on Numbers 34:13-15
This land, according to the boundaries thus described, the Israelites were to distribute by lot (Num 26:56), to give it to the nine tribes and a half, as the tribes of Reuben, Gad, and half Manasseh had already received their inheritance on the other side of the Jordan (Num 32:33.).
Tyndale Open Study Notes on Numbers 34:13-15
you are to divide . . . by sacred lot: Cp. 26:55-56. Because of the settlement of two and a half tribes (Reuben, Gad, and half the tribe of Manasseh) in Transjordan (cp. 32:33), Canaan was to be divided among the nine and a half remaining tribes.