Joshua 22:27-28, 34

We built this altar to show to our people and to your people and to the generations to come that we will worship YAHWEH at his tabernacle. We will bring all our offerings into YAHWEH’s presence there so that your children may never say to our children in the future, ‘You have no part in the worship of YAHWEH.’ We have decided among us that if that day should ever come, our descendants would reply: ‘See the replica of the altar of YAHWEH, which our fathers made here at the border between us—not for burnt offerings or sacrifices, but as a witness that we both serve the same God.’

The Reubenites and the Gadites called the altar Witness, for they said, “The altar stands as a witness to us all that YAHWEH is God.”