Jaiminīya (Talavakāra) Brāhmaṇa 2-8.276

2-8.276

atha yasyaitasya trivṛdahaḥ pañcadaśī rātristrivṛdahaḥ pañcadaśī rātristrivṛdahaḥ
pañcadaśī rātri svargakāmo heitena yajeta
datvaśca ha sautemanaso mitravicca daṃṣṭradyumnastau ha pratidarśasya vaibhāvatasya
śvaitnasya rājño brahmacāriṇāvāsatuḥ
tayorha mitraviddeṣṭradyumna ācāryakarma cakāra
gā ha sma rakṣati
atha hetaro'dhyāyameva cacāra
tau ha sma sāyaṃ samāgatyānyonyamāhaturāhara somyānūkte hastaṃ nidhāsyāva
āhara somya sucarite hastaṃ nidhāsyāva iti
atha ha datvaṃ sautemanasamācāryo'nuśaśāsa
tau ha sāyaṃ samāgatyānyonyamāhaturāhara somyānūkte hastaṃ nidhāsyāva āhara
somya sucarite hastaṃ nidhāsyāva iti
neti hovāca
ati vā ahaṃ tvadamukṣyācāryapraśiṣṭo vā ahamasmīti
sa ha tāṃ rātrimapriyaviddha uvāsa
śvo ha bhūte gā anviyāya
taṃ ha gaurīkṣitvaiva vijajñāvapriyaṃ vā asyeti

Now, as for this [rite] whose day is threefold (trivṛt) and night fifteenfold, whose day is threefold and night fifteenfold, whose day is threefold and night fifteenfold: one desirous of the heavenly world should sacrifice with this. / Datva Sautemanasa and Mitravid Daṃṣṭradyumna were students of Pratidarśa Vaibhāvata, the Śvaitna king. / Between the two of them, Mitravid Daṃṣṭradyumna performed the teacher's service: he guarded the cows. / The other, however, pursued only study. / Meeting in the evening, they would say to each other: "Come, gentle sir, let us lay our hands [together] over what has been recited; come, gentle sir, let us lay our hands [together] over what has been well conducted." / Then the teacher gave instruction to Datva Sautemanasa. / Meeting in the evening, they said to each other: "Come, gentle sir, let us lay our hands [together] over what has been recited; come, gentle sir, let us lay our hands [together] over what has been well conducted." / He said: "No. / I have surpassed you; I am one instructed by the teacher." / He spent that night struck with sorrow. / On the next day, he went after the cows. / A cow, just looking at him, perceived: "Verily, something unpleasant has happened to him."