Katha Upanishad Verse 2.3.3

Even the most powerful cosmic forces perform their duties out of respect for the supreme Law. From fear of Brahman, fire burns, the sun shines, and Indra, Wind, and Death speed to their tasks.

Sanskrit Verse

भयादस्याग्निस्तपति भयात्तपति सूर्यः ।
भयादिन्द्रश्च वायुश्च मृत्युर्धावति पञ्चमः ॥ ३ ॥

Transliteration

bhayādasyāgnistapati bhayāttapati sūryaḥ |
bhayādindraśca vāyuśca mṛtyurdhāvati pañcamaḥ || 3 ||

Translation

From fear of him, fire burns; from fear, the sun shines; from fear, Indra and Wind; and Death, the fifth, speeds.