Kaṭha Upaniṣad 5.7.p1

5.7.p1

ya eṣa supteṣu jāgarti kāmaṃ kāmaṃ puruṣo nirmimāṇaḥ /
tad eva śukraṃ tad brahma tad evāmṛtam ucyate /
tasmiṃl lokāḥ śritāḥ sarve tad u nātyeti kaścana //

8. He who is awake in those that sleep,
The Person who fashions desire after desire—
That indeed is the Pure. That is Brahma.
That indeed is called the Immortal.
On it all the worlds do rest;
And no one soever goes beyond it.