Mahabharata 1.2.232

1.2.232

svargaparva tato jñeyaṃ divyaṃ yattadamānuṣam |
adhyāyāḥ pañca saṃkhyātāḥ parvaitadabhisaṃkhyayā |
ślokānāṃ dve śate caiva prasaṃkhyāte tapodhanāḥ || 232 ||

"The Parva that comes after this, you must know, is the extraordinary one called Svarga of celestial incidents. Then seeing the celestial car come to take him, Yudhishthira moved by kindness towards the dog that accompanied him, refused to ascend it without his companion. Observing the illustrious Yudhishthira's steady adherence to virtue, Dharma (the god of justice) abandoning his canine form showed himself to the king. Then Yudhishthira ascending to heaven felt much pain. The celestial messenger showed him hell by an act of deception. Then Yudhishthira, the soul of justice, heard the heart-rending lamentations of his brothers abiding in that region under the discipline of Yama. Then Dharma and Indra showed Yudhishthira the region appointed for sinners. Then Yudhishthira, after leaving the human body by a plunge in the celestial Ganges, attained to that region which his acts merited, and began to live in joy respected by Indra and all other gods. This is the eighteenth Parva as narrated by the illustrious Vyasa. The number of slokas composed, O ascetics, by the great Rishi in this is two hundred and nine.