In the context of the Israelites settling in the Promised Land, the tribes of Reuben, Gad, and the half-tribe of Manasseh were given land on the east side of the Jordan River. To ensure that future generations would not be excluded from the community of Israel, they built an altar as a witness between them and the other tribes. This altar was not intended for sacrifices, which were to be offered only at the tabernacle, but as a symbol of their shared faith and covenant with God.
This action was a proactive step to maintain unity and prevent misunderstandings. The altar served as a physical reminder of their common heritage and commitment to worship the same God. It underscores the importance of communication and symbols in preserving relationships and spiritual unity. By clarifying their intentions, these tribes demonstrated a desire for peace and cohesion within the larger community of Israel, highlighting the value of understanding and mutual respect among believers.