Mahabharata 6.82.41

युध्यतां तु तथा तेषां कुर्वतां कर्म दुष्करम्अस्तं गिरिमथारूढे नप्रकाशति भास्करे

yudhyatāṃ tu tathā teṣāṃ kurvatāṃ karma duṣkaramastaṃ girimathārūḍhe naprakāśati bhāskare

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