Bhagavad-gītā 8.12
BG 8.12
Open the full passageसर्वद्वाराणि संयम्य मनो हृदि निरुध्य च । मूध्न्या।र्धायात्मनः प्राणमास्थितो योगधारणाम् ॥१२॥
Sanskrit
sarva-dvārāṇi saṁyamya mano hṛdi nirudhya ca mūrdhny ādhāyātmanaḥ prāṇam āsthito yoga-dhāraṇām
Translation
The yogic situation is that of detachment from all sensual engagements. Closing all the doors of the senses and fixing the mind on the heart and the life air at the top of the head, one establishes himself in yoga.