Joshua 22:9-10

9And the children of Reuben and the children of Gad and the half tribe of Manasseh returned, and departed from the children of Israel out of Shiloh, which is in the land of Canaan, to go to the country of Gilead, to the land of their possession, of which they had taken possession, according to the word of the LORD by the hand of Moses.

10And when they came to the borders of Jordan, that are in the land of Canaan, the children of Reuben and the children of Gad and the half tribe of Manasseh built there an altar by Jordan, a great altar in appearance.