Bhagavad Gita Chapter 8- Akshara Brahma Yoga - Sloka 12 & 13

The entire content of this mail is from Swami Chidbhavananda's translation of The Bhagavad Gita, published by Ramakrishna Mission

How the Yogi Relinquishes the Body 9-13

1 Gita Sloka  every day - Chapter 8 - Akshara Brahma Yoga - Sloka 12

Jadabharathar thinking of his deer while dying

Sarva dwarani samyamya manah hridi nirudhya cha I

Murdhin adhaya atmanah pranam asthitah yoga dharanam II sloka 12

सर्व द्वाराणि संयम्य मनः हृदि निरुध्य च I 
मुर्धिन् आधाय आत्मनः प्राणां आस्थितः योग धारणं I I श्लोक 12

Aum iti eka aksharam brahma vyaharan mam anusmaran I

Yah prayati tyajan deham sah yati paramam gatim II sloka 13

ओम् इति एक अक्षरं ब्रह्म व्याहरन मां अनुस्मरन् I यः प्रयाति त्यजन् देहं सः यति परमां गतिं I I श्लोक 13

All the gates of the body closed, the mind confined within the heart, having fixed his life energy in the head, engaged in firm yoga; uttering the one-syllabled 'Om', Brahman, thinking of Me, he who departs, leaving the body, attains the Supreme Goal.

This is how the yogi brings his embodied existence to an end. As the river enters the ocean, the individual consciousness of the yogi merges in the cosmic consciousness, which is Brahman. The activities of the body and the senses all cease, as when going to sleep. As a bird turns to a tree to roost, the mind of the yogi settled in his heart, at the time of death. Contrary to this, the mind of the worldly wanders woefully on mundane things. Cold spreads all over the body as the prana  leaves it. As a traveller goes to a vehicle station, the prana goes to the head. for this reason the yogi's head is the last region from which the warmth vanishes. It is yogadharana for the mid to be fixed in iswara at the time of departure.  The sound vibration "Aum" persists then. The spiritual content  of this vibration is experienced as Infinite Bliss and Brilliance of the Pure Consciousness. This Brahmanirvanam  is the Supreme goal attained by the yogi. 

The formative thought that dominates the mind of the one who leaves the body, is the factor that governs and contributes to the next birth of that individual. Spiritual discipline is therefore imperative to one and all. The devotee of the Lord is ever immersed in the thought of God. Being firmly fixed in it, he reaches the Lord on giving up the body.

Sri Ramakrishna Paramahamsa