Mahabharata 7.102.30

न ह्यसाध्यमकार्यं वा विद्यते मम मानदआज्ञापय कुरुश्रेष्ठ मा च शोके मनः कृथाः

na hyasādhyamakāryaṃ vā vidyate mama mānadaājñāpaya kuruśreṣṭha mā ca śoke manaḥ kṛthāḥ

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