Mbh 12.195.1a

"'Bhishma said, "I shall now, O son of Pritha, discourse to thee upon the four kinds of yoga meditation. The great Rishis, obtaining a knowledge of the same, attain to eternal success even here. Great Rishis gratified with knowledge, with hearts set upon Emancipation, and conversant with yoga, act in such a way that their yoga meditation may get on properly. These, O son of Pritha, being freed from the faults of the world, never come back (for rebirth). Liberated from liability to rebirth, they live in their original Soul-state.[618] Freed from the influence of all pairs of opposites (such as heat and cold, joy and sorrow, etc.), ever existing in their own (original) state, liberated (from attachments), never accepting anything (in gift), they live in places free from the companionship of wives and children, without others with whom disputes may arise, and favourable to perfect tranquillity of heart. There such a person, restraining speech, sits like a piece of wood, crushing all the senses, and with mind undividedly united by the aid of meditation (with the Supreme Soul). He has no perception of sound through the ear; no perception of touch through the skin; no perception of form through the eye; no perception of taste through the tongue. He has no perception also of scents through the organ of smell. Immersed in yoga, he would abandon all things, rapt in meditation. Possessed of great energy of mind, he has no desire for anything that excites the five senses. The wise man, withdrawing his five senses into the mind, should then fix the unstable mind with the five senses (into the Intellect). Possessed of patience, the yogin should fix his mind which always wanders (among worldly objects), so that his five gates (under the influence of training) may be made stable in respect of things that are themselves unstable. He should, in the firmament of the heart, fix his mind into the path of meditation, making it independent of the body or any other refuge.