acintyam-avyaktam-ananta rupam
śivam praśāntam amṛtam brahmayonim
tathā ādimadhyāntavihīnam ekam
vibhum chid-ānandam arūpam adbhutam

(Who is) unthinkable, unmanifest, of endless forms
the good, the peaceful, Immortal, the origin of the worlds
without beginning, middle, and end, the only one
all-pervading, Consciousness, and Bliss, the formless and the wonderful

~ Kaivalya Upaniṣad, Verse 6
Translation Swāmi Mādhavānanda, from Minor Upaniṣads