בראשית, פרק ה׳, פסוק ט״ז

The ongoing record of early humanity tracks the lifespans of the first generations, specifically noting the period Mahalalel lived after the birth of his son Jared. A closer look at the exact length of this period reveals a unique numerical structure.

According to [קאסוטו], this age is built upon a specific method of calculating time. The primary and central number is eight hundred years. To this base, six defined units of time are added. Each of these smaller units consists of exactly sixty months, and together they complete the additional thirty years of his life.