Vishnupurana 2.8.p14

2.8.p14

On the north of Agastya, and south of Ajabithi (the line of the Goat) and outside the Vaiswānarapath is situate the road of the Pitris. There live the great Rishis who offer oblations to the fire. They read those portions of the Vedas which contain injunctions for the multiplication of the progeny. They perform the duties of ministrant priests and at the end of yugas they make new rules of conduct and re-establish the interrupted ritual of the Vedas. And after their death they proceed by the southern course. Mutually descending from each other in successive births, progenitor coming from descendant and descendant from progenitor, they repeatedly appear in different houses and races along with their prosterity, austere practices and established rites, residing to the south of the solar orb as long as the moon and stars endure.