Joshua 22:10-11

10When they came to the region of the Jordan which is in the land of Canaan, the sons of Reuben and the sons of Gad and the half-tribe of Manasseh built an altar there by the Jordan, an altar that was great to behold.

11And the [other] sons of Israel heard it said, “Look, the sons of Reuben and the sons of Gad and the half-tribe of Manasseh have built an altar at the edge of the land of Canaan, in the region [west] of the Jordan, on the side belonging to the sons of Israel.”