שמות, פרק ל״ה, פסוק ז׳

The construction of the Tabernacle required a precise collection of materials to form its structural foundation and protective layers. The gathered supplies specifically included the components needed to craft the flexible roof coverings and the solid beams for the walls [ביאור שטיינזלץ].

To create the layers of the roof, the Israelites provided ram skins that underwent a specific preparation process. These hides first had their hair removed and were then dyed red [ביאור שטיינזלץ]. Alongside the ram skins, another protective layer was fashioned from the hides of a creature known as the tachash. The exact identity of this animal remains a mystery today. It may have been a creature that is now extinct or possibly a type of marine mammal. Regardless of its exact species, the skin of the tachash was highly valued and was also traditionally used in the crafting of shoes [ביאור שטיינזלץ].

Supporting these heavy, layered coverings were the structural walls of the Tabernacle itself. These supports were constructed using sturdy wooden beams cut from acacia trees [ביאור שטיינזלץ].