ŚVETĀŚVATARA UPANISHAD · 6.2

येनावृतं नित्यम् इदं हि सर्वं ज्ञः कालकालो गुणी सर्वविद्यः ।
तेनेशितं कर्म विवर्तते ह पृथिव्याप्तेजोऽनिलखानि चिन्त्यम् ॥

yenāvṛtaṃ nityam idaṃ hi sarvaṃ jñaḥ kālakālo guṇī sarvavidyaḥ ।
teneśitaṃ karma vivartate ha pṛthivyāptejo’nilakhāni cintyam ॥

It is at the command of him who always covers this world, the knower, the time of time, who assumes qualities and all knowledge, it is at his command that this work (creation) unfolds itself, which is called earth, water, fire, air, and ether;

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)