Śatapatha Brāhmaṇa ("of a hundred paths") 1.6.4.16

1.6.4.16

tadvā etat | avikṣīṇameva devānāmannādyam pariplavate 'vikṣīṇaṃ ha vā asyāsmiṃloke 'nnam bhavatyakṣayyamamuṣmiṃloke sukṛtaṃ ya evametadveda

Now it is only when that food of the gods is unfailing that it comes back (to men): for him, therefore, who knows this, there is unfailing food in this, and imperishable righteousness in yonder, world.