Chāndogya Upaniṣad 4.3.7

4.3.7

tad u ha śaunakaḥ kāpeyaḥ pratimanvānaḥ pratyeyāya \
ātmā devānāṃ janitā prajānāṃ hiraṅyadaṃṣṭro babhaso 'nasūriḥ \
mahāntam asya mahimānam āhur anadyamāno yad anannam atti \
iti vai vayam brahmacārin nedam upāsmahe dattāsmai bhikṣām iti \\403.7\

7. Then Śaunaka Kāpeya, considering this, replied:— “The Self (ātman) of gods, of creatures Procreator, With golden teeth Devourer, truly Wise One— His mightiness they say is truly mighty; He eats what is not food, and is not eaten. Thus, verily, O student of sacred knowledge, do we reverence It.—Give ye him alms.”