One verse

Srimad Bhagavatam 7.15.34

7.15.34

एवमभ्यस्यतश्चित्तं कालेनाल्पीयसा यते: । अनिशं तस्य निर्वाणं यात्यनिन्धनवह्निवत् ॥ ३४ ॥

evam abhyasyatas cittam kalenalpiyasa yateh anisam tasya nirvanam yaty anindhana-vahnivat

evam
in this way
abhyasyatah
of the person practicing this yoga system
cittam
the heart
kalena
in due course of time
alpiyasa
very shortly
yateh
of the person practicing yoga
anisam
without cessation
tasya
of him
nirvanam
purification from all material contamination
yati
reaches
anindhana
without flame or smoke
vahnivat
like a fire.

When the yogi regularly practices in this way, in a short time his heart becomes fixed and free from disturbance, like a fire without flames or smoke.