Joshua 22:9-12 - Eastern Tribes Build An Altar

⁹ And the sons of Reuben and the sons of Gad and the half tribe of Manasseh returned, departing from the sons of Israel out of Shiloh, which is in the land of Canaan, to go unto the country of Gilead, to the land of their possession, of which they were the possessors, according to the word of the LORD by the hand of Moses. ¹⁰ And when they came unto the borders 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 next to the Jordan, a great altar to look upon.

¹¹ And the sons of Israel heard it said, Behold, the sons of Reuben and the sons of Gad and the half tribe of Manasseh have built an altar over against the land of Canaan, in the borders of the Jordan, at the passage of the sons of Israel. ¹² And when the sons of Israel heard of it, the whole congregation of the sons of Israel gathered themselves together at Shiloh, to go up to war against them.