Sa tu dīrgha kāla nairantarya satkārāsevito drdhabhūmih

12. Abhyāsa vairāgyābhyām tannirodhah; 13. Tatra shitau yatno’bhyāsah

Anubhūtavisayāsampramosah smrtih

Abhāva pratyayālambanā vrttir nidrā

Śabdajñānānupāti vastu śūnyo vikalpah

Viparyayo mithyājñānam atadrūpa prastisham

Yoga sutras 6 y 7

Yogaś citta vrtti nirodhah