This subject is a mystery to the very celestials, O king. Yama of pure deeds, with the help of vows well observed and Yoga meditation, had acquired the knowledge of these mysteries as the high fruits of his penances.
देवगुह्यमिदं राजन् यमेनाक्लिष्टकर्मणा। नियमस्थेन युक्तेन तपसो महतः फलम्॥