Mbh 13.107.2k

That man who having fasted for six and twenty days eats a single meal on the twenty-seventh day and bears himself in this way for a full year, pouring libations every day on his sacred fire, acquires great merit and proceeding to Heaven receives honours from the deities. Residing there, he subsists on nectar, freed from thirst of every kind, and enjoying every felicity. His soul purified of every dross and performing his journeys on a celestial car of great beauty, he lives there, O king, bearing himself after the manner of the celestial Rishis and the royal sages. Possessed of great energy, he dwells there in great happiness in the company of celestial damsels of highly agreeable manners, for three thousand Yugas and Kalpas. That man who having fasted for seven and twenty days eats a single meal on the twenty-eighth day and bears himself in this way for a full year, with soul and senses under perfect control, acquires very great merit, which, in fact, is equal to what is acquired by the celestial Rishis. Possessed of every article of enjoyment, and endued with great energy, he blazes with the effulgence of the midday sun. Sportive damsels of the most delicate features and endued with splendour of complexion, having deep bosoms, tapering thighs and full and round hips, decked with celestial ornaments, gladden him with their company while he rides on a delightful and excellent car possessed of the effulgence of the sun and equipped with every article of enjoyment, for thousands and thousands of Kalpas. That man who having fasted for eight and twenty days eats a single meal on the twenty-ninth day, and bears himself in this way for a full year, adhering all the while to truthfulness of speech, attains to auspicious regions of great happiness that are worshipped by celestial Rishis and royal sages.