Mahabharata 5.81.43

अपि जातु स कालः स्यात्कृष्ण दुःखविपर्ययःयदहं मातरं क्लिष्टां सुखे दध्यामरिंदम

api jātu sa kālaḥ syātkṛṣṇa duḥkhaviparyayaḥyadahaṃ mātaraṃ kliṣṭāṃ sukhe dadhyāmariṃdama

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