Shatapatha Brahmana 11.5.7.8

11.5.7.8

amṛtena ha vā eṣa devāṃstarpayati ya evaṃ vidvānyajūṃṣyaharahaḥ svādhyāyamadhīte ta enaṃ tṛptā

And he who, knowing this, studies day by day the Yagus-texts for his lesson, satisfies the gods with ambrosia; and, being satisfied, they satisfy him by every object of desire, by every kind of enjoyment.