Genesis 29:27
27 Fulfil her week, and we will give thee this also for the service which thou shalt serve with me yet seven other years.
Gen. 29:27. "Fulfil her week." By this it is evident that then, in those days, their time was divided out into weeks, or parcels of seven days, as it is now, by which may rationally be argued that the Sabbath was then observed among them, that it was an institution for the times before Moses, and that the remembrance of the institution was kept up in the world throughout the ages that preceded the Mosaic Dispensation. For the weekly division of time had its rise from the appointment of one day in seven to be observed as a Sabbath, and it was the observing the Sabbath that upheld this division.
Gen. 30:1