Śatapatha Brāhmaṇa ("of a hundred paths") 5.5.2.1

5.5.2.1

sa vai prayujāṃ havirbhiryajate | tadyatprayujāṃ havirbhiryajata ṛtūnvā etatsuṣuvāṇo yuṅkte ta enamṛtavo yuktā vahantyṛtūnvā prayuktānanucarati tasmātprayujāṃ havirbhiryajate

He performs the oblations of teams (prayugâm havîmshi). The reason why he performs the oblations of teams, is that the anointed thereby yokes the seasons, and thus yoked those seasons draw him along, and he follows the seasons thus yoked: therefore he performs the oblations of teams.