। ॥ ८ ॥
In plain words
Then do the aghamarṣaṇa, the rubbing away of sin, by holding prāṇa and apāna still — and set the mind down in the Full the way a pot lies sunk in the ocean.
Close to the Sanskrit
Then one should perform Aghamarṣaṇa—the effacing of sin—by restraining Prāṇa and Apāna, having placed the mind in the Full, like a pot sunk in the ocean.