samādhibhāvanārthaḥ kleśatanūkaraṇārthaś ca [YS 2.2]

sa hy āsevyamānaḥ samādhiṃ bhāvayati kleśāṃś ca pratanūkaroti. pratanūkṛtān kleśān prasaṃkhyānāgninā dagdhabījakalpān aprasavadharmiṇaḥ kariṣyatīti. teṣāṃ tanūkaraṇāt punaḥ kleśair aparāmṛṣṭā sattvapuruṣānyatāmātrakhyātiḥ sūkṣmā prajñā samāptādhikārā pratiprasavāya kalpiṣyata iti.

atha ke kleśāḥ kiyanto veti ---