Śrīmad-Bhāgavatam 3.28.10
SB 3.28.10
Open the full passageSanskrit
mano 'cirāt syād virajaṁ jita-śvāsasya yoginaḥ vāyv-agnibhyāṁ yathā lohaṁ dhmātaṁ tyajati vai malam
Translation
The yogīs who practice such breathing exercises are very soon freed from all mental disturbances, just as gold, when put into fire and fanned with air, becomes free from all impurities.