A delegation is sent to the Transjordan tribes
The Israelites sent a delegation from Shiloh to the Transjordan tribes to see why they built an altar. The Transjordan tribes explained that it was an altar of witness, and the other Israelites were satisfied.
Key passages
Jos 22:12–34

When the Israelites heard of it, the whole congregation of the Israelites gathered at Shiloh to go up against them for battle. And the Israelites sent to the descendants of Reuben, Gad, and the half-tribe of Manasseh, to the land of Gilead, Phinehas the priest son of Eleazar, and …