Śatapatha Brāhmaṇa ("of a hundred paths") 6.7.4.7

6.7.4.7

yadveva viṣṇukramavātsapre bhavataḥ | viṣṇukramairvai prajāpatiḥ svargaṃ lokamabhiprāyātsa etadavasānamapaśyadvātsapraṃ tenāvāsyadapradāhāya yaddhi yuktaṃ na vimucyate pra taddahyate tathaivaitadyajamāno viṣṇukramaireva svargaṃ lokamabhiprayāti vātsapreṇāvasyati

And, again, why the Vishnu-strides and the Vâtsapra rite are (performed);--by the Vishnu-strides Pragâpati created this world, and by the Vâtsapra the fire (Agni); by the Vishnu-strides Pragâpati created the air, and by the Vâtsapra the wind (Vâyu); by the Vishnu-strides Pragâpati created the sky, and by the Vâtsapra the sun (Âditya); by the Vishnu-strides Pragâpati created the regions, and by the Vâtsapra the moon; by the Vishnu-strides Pragâpati created that which has been, and by the Vâtsapra that which shall be; by the Vishnu-strides Pragâpati created possession (wealth), and by the Vâtsapra hope; by the Vishnu-strides Pragâpati created the day, and by the Vâtsapra the night; by the Vishnu-strides Pragâpati created the former (bright) fortnights, and by the Vâtsapra the latter (dark) fortnights; by the Vishnu-strides Pragâpati created the half-months, and by the Vâtsapra the months; by the Vishnu-strides Pragâpati created the seasons, and by the Vâtsapra the year: thus the reason why the Vishnu-strides and Vâtsapra are (performed) is that he thereby even now creates everything.