In the choice of this tribe God showed His preference for the seventh, for Levi was the seventh pious man, starting from Adam, to wit: Adam, Noah, Enoch, Abraham, Isaac, Jacob, and Levi. As in this instance, so in many others did God indicate His love for the seventh. He sits enthroned in the seventh heaven; of the seven worlds the seventh alone is inhabited by human beings; of the early generations the seventh was the most excellent, for it produces Enoch.
Moses, seventh among the Patriarch, was judged worthy of receiving the Torah. David, seventh son of Jesse, was chosen as king. In periods of time, also, the seventh was the favorite. The seventh day is the Sabbath; the seventh month, Tishri, is the month of the holy days; the seventh year is the Sabbatical year of rest, and every seventh Sabbatical year of rest is the year of jubilee.