Kaṭha Upaniṣad 6.3

6.3

bhayād asyāgnis tapati bhayāt tapati sūryaḥ /
bhayād indraś ca vāyuś ca mṛtyur dhāvati pañcamaḥ //

2. This whole world, whatever there is,
Was created from and moves in Life (prāṇa).
The great fear, the upraised thunderbolt—
They who know That, become immortal.
3. From fear of Him fire (Agni) doth burn.
From fear the sun (Sūrya) gives forth heat.
From fear both Indra and Wind (Vāyu),
And Death (Mṛityu) as fifth, do speed along.