שמות, פרק כ״ו, פסוק כ״א

The construction of the Tabernacle features precise symmetry, particularly in the design of its main walls. The northern and southern sides of the structure are built in a straightforward and completely identical manner. The requirement of forty silver bases for this wall shows that it perfectly mirrors the opposite side [ביאור שטיינזלץ, קאסוטו].

Even though the engineering of both walls is exactly the same, the way they are recorded differs slightly. The account of the northern wall leaves out a specific architectural detail that was previously included when detailing the southern wall. This omission does not reflect a change in the actual building plans, but rather serves to add natural variety to the writing [קאסוטו].

Beyond the practical building instructions, the repeated total of forty bases for each of the two walls carries a deeper symbolic meaning. This specific amount serves as a subtle reminder of the forty days and forty nights that Moses spent on Mount Sinai [שפתי כהן].