Having perfected the yoga sitting postures and conquered the breathing process, one should make the mind steady by detachment and the regulated practice of yoga. Thus one should carefully fix the mind on the single goal of yoga practice.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
मन एकत्र संयुञ्ज्याज्जितश्वासो जितासनः । वैराग्याभ्यासयोगेन ध्रियमाणमतन्द्रितः
mana ekatra saṃyuñjyājjitaśvāso jitāsanaḥ | vairāgyābhyāsayogena dhriyamāṇamatandritaḥ
SB 11.9.11