שמות, פרק ל״ח, פסוק כ׳

As the construction of the Tabernacle nears completion, the focus shifts to the practical materials used to connect and stabilize the structure. The pegs were essential tools used to firmly secure and stretch the curtains surrounding the holy space [ביאור שטיינזלץ].

Usually, structural pegs are forged from iron due to its natural strength. However, these specific pegs were crafted entirely from copper. This deliberate choice teaches a fundamental principle about the nature of the sacred space. Iron symbolizes the weaponry and pride of Esau, representing bloodshed and war. Because of this association with violence, iron is despised before God and was entirely excluded from the holy construction.

The banishment of iron from the Tabernacle was absolute. This strict standard applied not only to the inner, more sacred areas but extended to the outermost parts of the structure. Even the pegs used to secure the surrounding outer courtyard were made of copper rather than iron, ensuring that no material associated with war would have any place in the holy environment [שפתי כהן].