Yoga Sutra 2.48: Thus thru Asana, one is undisturbed by dualities of pairs of inseparable opposites.

Yoga Sutras of Patañjali. Aligning body, mind and soul with the infinite

48th Sutra Chapter 2 From then on, the sadhaka is undisturbed by the dualities of the pairs of inseparable opposites. Like pain and pleasure, heat and cold, success and failure, honor and dishonour... His whole life is transformed. —————————————— ततो द्वन्द्वानभिघातः tatah: consequently, then, at this point dvandva: by the opposites, opposing pair, duality, dualism anabhighaataH: not afflicted, undisturbed, invulnerability ---------------------------