Srimad Bhagvata Mahapurana: Book 12: Chapter 11: Verses 46-50
Coursing round (the universe) all the twelve months (of a year) alongwith His six attendants (enumerated in the foregoing verses) the said Deity unquestionably awakens good sense in the mind of His votary both here and hereafter. The sages (forming the entourage of the Sun-god) duly extol Him through hymns, of Samaveda, Rgveda and Yajurveda revealing His glory; the Gandharvas sing His praises, while the Apsaras dance before him. The Nagas serve the purpose of keeping the parts of the chariot together; the Yaksas make his chariot ready for service, while the mighty Raksasas push the chariot from behind. Sixty thousand pure-minded Brahmana sages, (collectively) known as the Valakhilyas, walk ahead facing the Sun-god (all the twelve months) and celebrate the Deity through laudatory Mantras. Dividing Himself (into twelve, each form presiding over the sun for one month), the almighty Lord Sri Hari, who is without beginning or end, and is (therefore) birthless, protects the worlds as aforesaid in every Kalpa.
Thus ends the eleventh discourse over the description of the Sun-god
months o a year) (presiding under different
with His entourage" in Book Twelve of the great and glorious
Bhagavata-Purana, otherwise known as