Numbers 34:13-15

And Moses gave orders to the children of Israel saying, This is the land which is to be your heritage, by the decision of the Lord, which by the Lord's order is to be given to the nine tribes and the half-tribe: For the tribe of the children of Reuben, by their fathers' families, and the tribe of the children of Gad, by their fathers' families, and the half-tribe of Manasseh, have been given their heritage: The two tribes and the half-tribe have been given their heritage on the other side of Jordan at Jericho, on the east looking to the dawn.