Muṇḍaka Upaniṣad 2.2.8

2.2.8

manomayaḥ prāṇaśarīranetā pratiṣṭhito 'nne hṛdayaṃ sannidhāya.
tad vijñānena paripaśyanti dhīrā ānandarūpam amṛtaṃ yad vibhāti.

7. He who is all-knowing, all-wise,
Whose is this greatness on the earth—
He is in the divine Brahma city
And in the heaven established! The Soul (Ātman)!
Consisting of mind, leader of the life-breaths and of the body,
He is established on food, controlling the heart.
By this knowledge the wise perceive
The blissful Immortal that gleams forth.