Verse 6.7.4.7

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

Preview of English translation:

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

For a detailled translation, including proper diacritics and footnotes, go the full English translation.