Jaiminīya (Talavakāra) Brāhmaṇa 2-8.302

2-8.302

te'harbhāja āsan
tato vai teṣāmahnaivaika ārdhnodahnaiko'hnaikaḥ
sā ha khalu vai śreṣṭharddhīnāṃ sa lokānāṃ puṇyatamo yametena saptarṣaya ārdhnuvan
sā yā śreṣṭharddhīnāṃ yo lokānāṃ puṇyatamo yametena saptarṣaya
ārdhnuvaṃstamṛdhnavānīti
tasmātsaptarātreṇa yajate
saptaitānyahāni bhavanti sapta stomāḥ
ahareva stomo vahatyaha stomo'ha stomaḥ
sā ha khalu vā ahnāṃ samṛddhiryadenāni nānā stomā vahanti
sā yaivāhnāṃ samṛddhissaivaiṣā kriyate
ta u sarve sapta saṃpadyaikaviṃśamevābhisaṃpadyante trivṛcca trayastriṃśaśca tau
dvāvekaviṃśau pañcadaśaśca triṇavaśca tau dvāvekaviṃśau saptadaśaśca pañcaviṃśaśca tau
dvāvekaviṃśāvekaviṃśa evaikaviṃśaḥ
dvādaśa māsāḥ pañcartavastraya ime lokā asāvāditya ekaviṃśaḥ
etasya vā ete salokatāṃ gacchanti ye saptarātrayājinaḥ
etamabhisaṃpanna eṣāṃ loka ṛdhnoti
etaṃ gacchatyetasya salokatāṃ ya evaṃ veda

They became sharers of the days.
Then, day by day, one after another of them prospered: one on one day, one on one day, one on one day.
That, truly, is the best of prosperities, that is the holiest of worlds, which the Seven Ṛṣis prospered by this.
[Thinking,] 'May I prosper in that which is the best of prosperities, that which is the holiest of worlds, which the Seven Ṛṣis prospered by this,'
he therefore sacrifices with a seven-day rite.
These become seven days, seven stomas.
A stoma carries each day, a stoma each day, a stoma each day.
That, indeed, is the perfection of the days, that different stomas carry them.
That which is the perfection of the days is thus brought about.
And all seven of them, being combined, correspond to the twenty-one-fold [stoma]: the trivṛt and the trayastriṃśa make two twenty-one-folds; the pañcadaśa and the triṇava make two twenty-one-folds; the saptadaśa and the pañcaviṃśa make two twenty-one-folds; the twenty-one-fold is the twenty-one-fold itself.
Twelve months, five seasons, these three worlds: that sun is the twenty-first.
To companionship in the world of this [sun] go those who sacrifice with the seven-day rite.
Complying with this, their world prospers.
He goes to this, he attains companionship in the world of this, who knows thus.