Śatapatha Brāhmaṇa ("of a hundred paths") 13.4.3.10

13.4.3.10

atha ṣaṣṭhe'han evamevaitāsviṣṭiṣu saṃsthitāsveṣaivāvṛdadhvaryaviti havai hotarityevādhvaryuḥ kubero vaiśravaṇo rājetyāha tasya rakṣāṃsi viśastānīmānyāsata iti selagāḥ pādakṛta upasametā bhavanti tānupadiśati devajanavidyā vedaḥ so'yamiti devajanavidyāyā ekam parva vyācakṣāṇa ivānudra>

And on the sixth day, after those (three) offerings have been performed in the same way, there is the same course of procedure. 'Adhvaryu!' he (the Hotri) says.--'Havai hotar!' replies the Adhvaryu.--'King Kubera Vaisravana,' he says; 'his people are the Rakshas, and they are staying here;'--evil-doers, robbers, have come thither: it is these he instructs;--'The Devaganavidyâ (demonology) is the Veda: this it is;' thus saying, let him go over one section of the Devaganavidyâ, as if he were reciting it. The Adhvaryu calls in the same way (on the masters of lute-players), but does not perform the Prakrama oblations.