When they approached the Jordan region, still in the land of Canaan, the tribes of Reuben and Gad, and the half-tribe of Manasseh built a large and impressive altar beside the Jordan River.
The Lord appeared to Abram and said, “I'm going to give this land to your descendants.” So Abram built an altar to the Lord there because that was where the Lord appeared to him.
Then he moved on to the hill country east of Bethel and set up camp there. Bethel was to the west and Ai to the east. He built an altar to the Lord there and worshiped him.
The Israelites were told, “Look, the tribes of Reuben and Gad, and the half-tribe of Manasseh have built an altar in the Jordan region of the land of Canaan, on the side belonging to the Israelites.”
So the tribes of Reuben and Gad, and the half-tribe of Manasseh left the rest of the Israelites at Shiloh in the land of Canaan and went home to their land in Gilead that they had received at the Lord's command through Moses.