Mbh 12.232.1f

As regards the other yugas, it is seen that without at once giving up the duties and acts that are consistent with righteousness, men, observant of the practices of their respective orders, and conversant with the ordinance of the Vedas are led by the authority of the scriptures, to betake themselves from motives of advantage and interest to sacrifices and vows and pilgrimages to sacred waters and spots.[890] As in the season of rains a large variety of new objects of the immobile order are caused to come forth into life by the showers that fall from the clouds, even so many new kinds of duty or religious observances are brought about in each yuga. As the same phenomena reappear with the reappearance of the seasons, even so, at each new Creation the same attributes appear in each new Brahman and Hara. I have, before this, spoken to thee of Time which is without beginning and without end, and which ordains this variety in the universe. It is that Time which creates and swallows up all creatures. All the innumerable creatures that exist subject to pairs of opposites and according to their respective natures, have Time for their refuge. It is Time that assumes those shapes and it is Time that upholds them.[891] I have thus discoursed to thee, O son, on the topics about which thou hadst inquired, viz., Creation, Time, Sacrifices and other rites, the Vedas, the real actor in the universe, action, and the consequences of action.'"'"