Kaṭha Upaniṣad 5.15.p2

5.15.p2

ūrdhvamūlo avākśākha eṣo 'śvatthaḥ sanātanaḥ /
tad eva śukraṃ tad brahma tad evāmṛtam ucyate /
tasmiṃl lokāḥ śritāḥ sarve tad u nātyeti kaścana //

1. Its root is above, its branches below— This eternal fig-tree! That (root) 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. This, verily, is That!