The knower of scriptures shall practise yoga in the spot facing the north-east. He shall restrain lust, doubt, pleasure, happiness and misery mentally and only concentrate on clean, meditation. He shall meditate on the nose, tongue, eyes, skin, ears and mind. He shall retain them in the intellect and chest. After realising the time and actions he shall retain these parts of the body in the groups perpetually. This retention of the twelve parts of the body is called yogadhāraṇā. The man shall perform hundred or fifty such Dhāraṇās on the head.