BG 8.12
सर्वद्वाराणि संयम्य मनो हृदि निरुध्य च
मूर्ध्न्याधायात्मनः प्राणमास्थितो योगधारणाम्
sarvadvārāṇi saṃyamya mano hṛdi nirudhya ca
mūrdhnyādhāyātmanaḥ prāṇamāsthito yogadhāraṇām
TRANSLATION
Who, controlling all the doors (senses), holding the mind within the heart, fixing his life-breath within the head, maintains himself in steady concentration;