Mbh 1.61.7

“Then, for some reason, Yudhishthira the just, gifted with great energy and prowess, sent his brother Arjuna who was capable of drawing the bow with the left hand, dearer unto him than life itself, into the woods. And Arjuna, that tiger among men, of firm soul, and gifted with every virtue, lived in the woods for eleven years and months. And during this period, on a certain occasion, Arjuna went to Krishna in Dwaravati. And Vibhatsu (Arjuna) there obtained for a wife the lotus-eyed and sweet-speeched younger sister of Vasudeva, Subhadra by name. And she became united, in gladness, with Arjuna, the son of Pandu, like Sachi with the great Indra, or Sri with Krishna himself. And then, O best of monarchs, Arjuna, the son of Kunti, with Vasudeva, gratified Agni; the carrier of the sacrificial butter, in the forest of Khandava (by burning the medicinal plants in that woods to cure Agni of his indigestion). And to Arjuna, assisted as he was by Kesava, the task did not at all appear heavy even as nothing is heavy to Vishnu with immense design and resources in the matter of destroying his enemies. And Agni gave unto the son of Pritha the excellent bow Gandiva and a quiver that was inexhaustible, and a war-chariot bearing the figure of Garuda on its standard. And it was on this occasion that Arjuna relieved the great Asura (Maya) from fear (of being consumed in the fire). And Maya, in gratitude, built (for the Pandavas) a celestial palace decked with every sort of jewels and precious stones. And the wicked Duryodhana, beholding that building, was tempted with the desire of possessing it. And deceiving Yudhishthira by means of the dice played through the hands of the son of Suvala, Duryodhana sent the Pandavas into the woods for twelve years and one additional year to be passed in concealment, thus making the period full thirteen.