Taittiriyaka-Upanishad: First Valli, Tenth Anuvaka

1. “I am he who shakes the tree (i.e. the tree of the world, which has to be cut down by knowledge). 2. My glory is like the top of a mountain. 3. I, whose pure light (of knowledge) has risen high, am that which is truly immortal, as it resides in the sun. 4. I am the brightest treasure. 5. I am wise, immortal, imperishable.” 6. This is the teaching of the Veda, by the poet Trisanku.