Joshua 22:11-12

Now the children of Israel heard someone say, “Behold, the children of Reuben, the children of Gad, and half the tribe of Manasseh have built an altar on the frontier of the land of Canaan, in the region of the Jordan—on the children of Israel’s side.” And when the children of Israel heard of it, the whole congregation of the children of Israel gathered together at Shiloh to go to war against them.