The works of Ādi Śaṅkarācārya

Sanatsujātīyam

p. 305

p. 305

अजश्चरो दिवारात्रमतन्द्रितश्च

In plain words

Unborn, and always moving — through the day, through the night, never once tiring.

Close to the Sanskrit

Unborn, moving, day-and-night unwearied, and —