Shatapatha Brahmana 11.5.6.5

11.5.6.5

ājyāhutayo ha vā etā devānām yadyajūṃṣi sa ya evaṃ vidvānyajūṃṣyaharahaḥ svādhyāyamadhīta ājyāhutibhireva taddevāṃstarpayati ta enaṃ tṛptāstarpayanti yogakṣemeṇa prāṇena re

And, verily, the Yagus-texts are ghee-offerings to the gods; and whosoever, knowing this, studies day by day the Yagus-texts for his lesson thereby satisfies the gods with ghee-offerings; and, being satisfied, they satisfy him by security of possession, by life-breath, by seed, by his whole self, and by all auspicious blessings; and rivers of ghee and rivers of honey flow for his Fathers, as their accustomed draughts.