Numbers 34:16

14for the tribe of the children of Reuben according to their fathers’ houses, the tribe of the children of Gad according to their fathers’ houses, and the half-tribe of Manasseh have received their inheritance.

15The two tribes and the half-tribe have received their inheritance beyond the Jordan at Jericho eastward, toward the sunrise.”

16The LORD spoke to Moses, saying,

17“These are the names of the men who shall divide the land to you for inheritance: Eleazar the priest, and Joshua the son of Nun.

18You shall take one prince of every tribe, to divide the land for inheritance.