מלכים א, פרק ז׳, פסוק י׳

To support the massive structure, the foundation of the building was set deep into the earth using heavy, highly valuable stones of remarkable size [רש"י, ביאור שטיינזלץ]. These were exceptionally large blocks measuring between eight and ten cubits in length, roughly equivalent to four or five meters [ביאור שטיינזלץ].

A clear architectural distinction existed between the base of the structure and the walls that rose above it. While the entire building was constructed from fine, high-quality materials, the stones were not uniform in size. The massive blocks were reserved strictly for the foundation. From the ground level upward, the walls were built using smaller, standard-sized hewn stones.

While it is natural to view these massive blocks purely as structural support buried underground, an ancient tradition offers a different perspective regarding their architectural and practical purpose [רד"ק]. Rather than being completely hidden in the earth, the stones of varying lengths were arranged so that they protruded inward from the wall, creating a series of stone ledges inside the building.

These built-in stone tiers served a highly specific function for the priests serving in the Temple. Because bringing actual beds into the sacred space was strictly forbidden, these protruding stones provided a designated sleeping area for the elder priests. Meanwhile, the younger priests slept directly on the floor, resting on their own garments.