Sāṃkhya Kārikā verse 12

prīti-aprīti-viṣāda-ātmakāḥ prakāśa-pravṛtti-niyamārthāḥ |
anyonya-abhibhava-āśraya-janana-mithuna-vṛttayaḥ ca guṇāḥ ||

prakāśa - brightnesspravṛtti - finer cognitionvṛtti - fluctuation; turned; set in motion; professionguṇa - attributes of nature; qualities

Commentaries and Reflections

Paul Harvey:

The Nature of the three Guṇa are Gratifying, Painful and Depressing,
(they serve) Brightness, Endeavour and Restraint, and are mutually Supressing, Supporting, Producing, Co-existing, Fluctuating.