Shloka 39
मण्डूकयोगशयनो यथान्यायं यथाविधि । दीक्षां चरति धर्मात्मा स नागै: सह मोदते,जो धर्मात्मा पुरुष न्यायानुसार विधिपूर्वक हठयोग-प्रसिद्ध मण्डूकयोगके अनुसार शयन करता और यज्ञकी दीक्षा लेता है, वह नागलोकमें नागोंके साथ सुख भोगता है
maṇḍūkayogaśayano yathānyāyaṃ yathāvidhi | dīkṣāṃ carati dharmātmā sa nāgaiḥ saha modate ||
Maheshvara said: The righteous man who, in accordance with proper rule and prescribed method, lies in the posture known in Haṭhayoga as the ‘Maṇḍūka-yoga’ and duly undertakes sacrificial consecration (dīkṣā), attains the Nāga-world and rejoices there in the company of the Nāgas.
श्रीमहेश्वर उवाच
Educational Q&A
That dharmic results arise from disciplined observance: when a person follows prescribed rules (nyāya, vidhi) in bodily restraint (Maṇḍūka-yoga posture) and ritual consecration (dīkṣā), the tradition associates this with a specific meritorious reward—joy in the Nāga realm—illustrating karmic correspondence between methodical practice and its fruit.
Maheśvara states a consequence of a particular vow-like regimen: a righteous practitioner who sleeps/abides in the Maṇḍūka-yoga manner and properly undertakes sacrificial dīkṣā is said to attain the Nāga-world and enjoy there with the Nāgas, as part of a broader Anuśāsana-Parva discourse on vows, disciplines, and their rewards.