Bhagavad Gītā Chapter Thirteen verse 21

puruṣaḥ prakṛtistho hi bhuṅkte prakṛtijān guṇān |
kāraṇaṃ guṇasaṅgo ’sya sadasadyonijanmasu ||

puruṣa - animating principle, self, consciousness, spirit; a person, man, a human being; peopleguṇa - an ingredient or constituent or attribute of nature; a property or characteristic of all created things; qualities; a quality, peculiarity, attribute or property; the peculiar properties of the lettersjanman - birth, production; re-birth

Commentaries and Reflections

Commentary by T Krishnamacharya:

Sukha and Duḥkha cannot be there at the same time.”