Mahabharata 5.131.6

यावज्जीवं निराशोऽसि कल्याणाय धुरं वहमात्मानमवमन्यस्व मैनमल्पेन बीभरःमनः कृत्वा सुकल्याणं मा भैस्त्वं प्रतिसंस्तभ

yāvajjīvaṃ nirāśo'si kalyāṇāya dhuraṃ vahamātmānamavamanyasva mainamalpena bībharaḥmanaḥ kṛtvā sukalyāṇaṃ mā bhaistvaṃ pratisaṃstabha

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