dhyānaheyās tadvṛttayaḥ [YS 2.11]

kleśānāṃ yā vṛttayaḥ sthūlās tāḥ kriyāyogena tanūkṛtāḥ satyaḥ prasaṃkhyānena dhyānena hātavyā yāvat sūkṣmīkṛtā yāvad dagdhabījakalpā iti. yathā vastrāṇāṃ sthūlo malaḥ pūrvaṃ nirdhūyate paścāt sūkṣmo yatnenopāyena cāpanīyate tathā svalpapratipakṣāḥ sthūlā vṛttayaḥ kleśānāṃ, sūkṣmās tu mahāpratipakṣā iti.