Śatapatha Brāhmaṇa ("of a hundred paths") 13.4.2.7

13.4.2.7

tasyai pañcadaśa sāmidhenyo bhavanti vārtraghnāvājyabhāgau ya imā viśvā jātānyā devo yātu savitā suratna ityupāṃśu haviṣo yājyānuvākye virājau saṃyājye hiraṇyaṃ dakṣiṇā suvarṇaṃ śatamānaṃ tasyoktam brāhmaṇam

For this (offering) there are fifteen kindling-verses; and the two butter-portions relate to the slaying of Vritra. [The verses, Rig-veda V, 82, 9; VII, 45, 1], 'He who calleth forth all these beings (with his call, may he, Savitri, quicken us)!' and 'May the divine Savitri come hither, treasure-laden, (filling the air whilst driving with his steeds; holding in his hand many things meet for man; and laying to rest and awakening the world),' pronounced in a low voice, are the invitatory and offering formulas of the chief oblation. Those of the Svishtakrit are two virâg-verses. The priests’ fee is gold weighing a hundred (grains): the meaning of this has been explained.