Śatapatha Brāhmaṇa ("of a hundred paths") 13.4.2.10

13.4.2.10

tasyai saptadaśa sāmidhenyo bhavanti sadvantāvājyabhāgau sadevāvarunddhe viśvāni deva savitaḥ sa ghā no devaḥ savitā sahāvetyupāṃśu haviṣo yājyānuvākye anuṣṭubhau saṃyājye rajataṃ hiraṇyaṃ dakṣiṇā nānārūpatāyā atho utkramāyānapakramāya śatamānam bhavati śatāyurvai puruṣaḥ śatendriya āyurevendriyaṃ vīryamātmandhatte

For this (offering) there are seventeen kindling-verses; and the two butter-portions are possessed of that which is: the (truly) existent he thereby obtains. [The verses, Rig-veda V, 82, 5; VII, 45, 31 'All troubles, O divine Savitri, (keep from us, do thou send us that which is good)!' and 'May that mighty god Savitri (the lord of treasure, send us treasure; shedding wide-spread lustre, may he bestow upon us the joys of mortal life)!' pronounced in a low voice, are the invitatory and offering formulas of the chief oblation. Those of the Svishtakrit are two anushtubh verses. Silver is the priests’ fee,--for the sake of variety of colour, and also for the sake of (the horse's) going outside and not going away. It weighs a hundred (grains), for man has a life of a hundred (years), and a hundred energies: it is life, and energy, vigour, he thus secures for himself.