Exodus 26:23
At these two corners they must be double at the bottom and joined at the top in a single ring; both shall be like that. The corner frames are doubled at the base — reinforced where the structural stress is greatest. The two doubled base frames are joined at the top by a single ring, creating the structural unity that the corner requires. The doubling at the bottom and unity at the top is an architectural version of a covenant principle: the foundation requires reinforcement, but the goal is unity. The structural engineering of the tabernacle corners is the engineering of the covenant community: double strength at the base, unified at the crown.