Around the fortieth century b.c., a cold wind scours the upper slopes of the holy mountain. Seth summons his heirs to the rock entrance. The steep ascent demands brutal physical exertion. The clan stands exhausted from hauling provisions up the sheer rock faces. The high altitude chills their skin. They harbor a deep fear of the valley below. The voice of the patriarch brings a final measure of peace against the gathering dark.
Seth feels his lungs failing. He orders Enos, Cainan, and Mahalaleel to stand near the burial crypt. He issues a strict tribal mandate. His people must not travel down into the lower valleys. They cannot mix with the descendants of Cain. This acts as a basic law of quarantine. The valley contains violence and contamination. The mountain provides a geographic fortress. Holding this high ground ensures their survival as a separated lineage.
The Cave of Treasures functions as a heavy vault. Ancient highland burial sites required massive stone blocks to deter animal scavengers. The heavy rocks keep the living away from the dead. Seth transforms this tomb into a permanent boundary line. Men naturally attach their strictest laws to immovable terrain. The rigid geography of the peak enforces a permanent social division between the two settlements.
A border drawn on a mountain only holds if the tribe refuses to walk down the trail.
Seth stopped breathing. His sons carried his body into the dark stone. The mountain served as a hard physical wedge between the bloodlines until the waters broke over the earth.