Mahabharata 7.156.20

किमु मानुषमात्रेण शक्यः स्यात्प्रतिवीक्षितुम्दृढमुष्टिः कृती नित्यमस्यमानो दिवानिशम्

kimu mānuṣamātreṇa śakyaḥ syātprativīkṣitumdṛḍhamuṣṭiḥ kṛtī nityamasyamāno divāniśam

Our plain-language meaning of this verse is waiting for scholar review.