Joshua summons the Reubenites, Gadites and the half-tribe of Manasseh. He commends them because they have kept everything Moses commanded them and what he himself commanded them, and they did not abandon their brothers for a long time. Now that the Lord has given rest to Israel, he sends them back to their tents, with the exhortation to take care to keep the commandment: to love the Lord, walk in all his ways, keep his commandments, hold fast to him and serve him with all their heart. He blesses them and shares the plunder with them. They leave Shiloh for Gilead.
When they reach the region of the Jordan, at Geliloth, the sons of Reuben, Gad and the half-tribe of Manasseh build an altar of great size there. The other Israelites hear that they have built an altar facing the land of Canaan, and the whole congregation gathers at Shiloh to go to war against them. First they send Phinehas, son of the priest Eleazar, with ten chiefs, one for each tribe.
The envoys accuse them of unfaithfulness against the God of Israel, recalling the sin of Peor and that of Achan, and offer that, if their land is unclean, they should cross over to the Lord's land where the tabernacle stands, but not rebel. The eastern tribes answer with a solemn oath before the Lord, the Mighty One, God. The altar is not for offering sacrifices, but a witness so that in the future the sons of the western tribes will not say to those of the east that they have no share in the Lord. They built it as a copy of the Lord's altar, not as an altar of their own.
Phinehas and the chiefs are pleased with that answer and acknowledge that the Lord is among them. They return and tell the people, and the Israelites bless God and no longer speak of war. The Reubenites and Gadites call the altar Witness, because it is a witness among them that the Lord is God.