Mahabharata 12.220.73

नाशं विनाशमैश्वर्यं सुखदुःखे भवाभवौविद्वान्प्राप्यैवमत्यर्थं न प्रहृष्येन्न च व्यथेत्

nāśaṃ vināśamaiśvaryaṃ sukhaduḥkhe bhavābhavauvidvānprāpyaivamatyarthaṃ na prahṛṣyenna ca vyathet

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