Numbers 34:13-15

13Moses commanded Bnei-Yisrael, saying, “This is the land which Adonai has commanded that you are to assign by lot to the nine and a half tribes.

14For the tribe of the sons of Reuben by their ancestral houses, the tribe of the sons of Gad by their ancestral houses, and the half-tribe of Manasseh have already received their inheritance.

15These two and a half tribes have received their inheritance on the east side of the Jordan at Jericho, toward the sunrise.”