Shatapatha Brahmana 9.5.2.13

9.5.2.13

atha ya etānyakṛtvā | pasmā api sarvairanyairyajñakratubhiryājayedetebhyo haivāsya samudrebhyaścandāṃsi punarāpyāyante candāṃsyanu loko lokamanvātmātmānamanu prajā paśavaḥ sa ha śvaḥ śva eva śreyānbhavati ya etāni parasmai na karotyathaiṣa ha vā asya daivo 'mṛta ātmā sa ya etāni parasmai karotyetaṃ ha sa daivamātmānam parasmai prayacatyatha śuṣka eva sthāṇuḥ pariśiṣyate

And he who, not having performed these (rites) for another person, were to officiate in the performance even of all other sacrifices, for him the metres again replenish themselves from out of those oceans, and after the metres the world, and after the world his own self, and after his own self his children and cattle: indeed, he who does not perform those rites for another person, becomes more prosperous day after day. For, indeed, these (rites) are his divine, immortal body; and he who performs them for another person, makes over to another his divine body, and a withered trunk is all that remains.