Mahabharata Adi Parva Chapter 126:2

Mahabharata Adi Parva (Sambhava Parva)

Mahabharata Adi Parva Chapter 126:2 He adopted the Brahmacharya mode of life, but for some inscrutable purpose the gods have in view, this his eldest son, Yudhishthira, was born there, begotten by Dharma himself. Then that illustrious king obtained from Vayu this other son—the foremost of all mighty men—called Bhima. This other son, begotten upon Kunti by Indra, is Dhananjaya whose achievements will humble all bowmen in the world. Look here again at these tigers among men, mighty in the use of the bow, the twin children begotten upon Madri by the twin Aswins. Leading in righteousness the life of a Vanaprastha in the woods, illustrious Pandu hath thus revived the almost extinct line of his grandfather. The birth, growth, and Vedic studies of these children of Pandu, will, no doubt, give you great pleasure. Steadily adhering to the path of the virtuous and the wise, and leaving behind him these children, Pandu departed hence seventeen days ago. His wife Madri, beholding him placed in the funeral pyre and about to be consumed, herself ascended the same pyre, and sacrificing her life thus, hath gone with her lord to the region reserved for chaste wives. Accomplish now whatever rites should be performed for their benefit. These are (the unburnt portions of) their bodies. Here also are their children—these oppressors of foes—with their mother. Let these be now received with due honours. After the completion of the first rites in honour of the dead, let the virtuous Pandu, who had all along been the supporter of the dignity of the Kurus, have the first annual Sraddha (sapindakarana) performed with a view to installing him formally among the Pitris.' "Vaisampayana continued, 'The ascetics with Guhyakas, having said this unto the Kurus, instantly disappeared in the very sight of the people. And beholding the Rishis and the Siddhas thus vanish in their sight like vapoury forms appearing and disappearing in the skies, the citizens filled with wonder returned to their homes.'"