Śāṅkhāyana (Kauṣītaki) Āraṇyaka 2.17

2.17

ŚĀ 2.17
When that Sūdadohas [verse] is recited once, being counted as an adjunct throughout the whole recitation, excluding the silent recitation, it amounts to a thousand Bṛhatīs. Of this very thousand of Bṛhatīs, there are thirty-six thousand syllables. That many are the days of a hundred-year lifespan. Thus he obtains the days of a hundred-year lifespan. Some indeed say that it is accomplished in the Anuṣṭubh [metre]: 'Speech indeed is this day; speech is the Anuṣṭubh; speech is indeed all beings; and speech is this all.' However, it is settled that it is accomplished in the Bṛhatī metre. He who burns here is indeed of the nature of the Bṛhatī. Thus he makes him prosper through his own metre. He calls upon [the deities] thrice. Three indeed are these worlds. Thus he obtains these worlds. The offering verse (yājyā) is that of the one-day soma rite; the one-day soma rite is indeed a firm foundation, precisely for the sake of a firm foundation. While the second vaṣaṭ-call is not yet made, they untie the swing. Holding the cup, he descends eastward from it, and pushes the board of the swing westward. Touching the cup, he mutters: 'May I follow this victory that I have won, lest I detach myself from this victory.' The supplementary libation (atigrāhya) belongs to Viśvakarman. This day indeed belongs to Prajāpati. Prajāpati is Viśvakarman; thus he makes him prosper through his own form. Indra told this day to Aṅgiras, and Aṅgiras to Dīrghatamas. Thereupon Dīrghatamas lived for ten lifespans of man. As to that, the seer also says: 'Dīrghatamas, son of Mamatā, growing old in the tenth decade of life.' 'This recitation belongs to one who desires a full lifespan,' Kauṣītaki used to say. Therefore, he who, knowing thus, recites this day, attains a full lifespan in this world; he obtains immortality and imperishability in the heavenly world.