Joshua 22:10-12

American Standard Version

¹⁰ And when they came unto the region about the Jordan, that is 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 the Jordan, a great altar to look upon. ¹¹ And the children of Israel heard say, Behold, the children of Reuben and the children of Gad and the half-tribe of Manasseh have built an altar in the forefront of the land of Canaan, in the region about the Jordan, on the side that pertaineth to the children of Israel. ¹² And when the children of Israel heard of it, the whole congregation of the children of Israel gathered themselves together at Shiloh, to go up against them to war.