Numbers 34:13-15

13Moses commanded the Israelites, “This is the land you will divide by drawing lots. The Lord has commanded that this land will be given to the nine-and-a-half tribes.

14The households from the tribes of Reuben, Gad, and half of the tribe of Manasseh have already received their land.

15Those two-and-a-half tribes received land east of the Jordan River across from Jericho.”