Mahabharata — Anushasana Parva, Shloka 456
Pratyakṣa–Āgama–Ācāra: Doubt, Proof, and the Practice of Dharma (प्रत्यक्ष–आगम–आचारविचारः)
देहं चानशने त्यक्त्वा स स्वर्गे सुखमेधते । जो वानप्रस्थ अपने चारों ओर विशुद्ध आकाशको ग्रहण करता हुआ खुले मैदानमें वेदीपर सोता और बारह वर्षोके लिये प्रसन्नतापूर्वक व्रतकी दीक्षा ले उपवास करके अपना शरीर त्याग देता है
dehaṃ cānaśane tyaktvā sa svarge sukham edhate |
大自在天宣示：凡以绝食而舍此身者——既受林居者（vānaprastha）之严苦戒行，又守清净之开阔天居——必得升天，于彼界享受安乐。其伦理旨趣在于：以有纪律的出离与坚固守愿，作为通往更高世界的正法之道。
श्रीमहेश्वर उवाच
Educational Q&A
The verse teaches that disciplined renunciation—specifically giving up the body through fasting undertaken as a vowed ascetic practice—yields a meritorious result: attainment of heaven and enjoyment of happiness there. It frames self-control and steadfast vrata-observance as dharmic means to higher posthumous states.
Śrīmaheśvara is speaking, describing the फल (result) of an austere practice: a person who abandons the body by fasting (anaśana) is said to prosper in svarga. The surrounding prose in the provided text elaborates this as a forest-dweller’s vow and austerity culminating in heavenly reward.