Mahabharata 12.308.108
सुखदुःखे जरामृत्यू लाभालाभौ प्रियाप्रियेइति चैकोनविंशोऽयं द्वंद्वयोग इति स्मृतः
sukhaduḥkhe jarāmṛtyū lābhālābhau priyāpriyeiti caikonaviṃśo'yaṃ dvaṃdvayoga iti smṛtaḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book