Mahabharata Virat Parva Chapter 5:2

Mahabharata Virat Parva Chapter 5:2 And the warlike Yudhishthira, that represser of foes, unfastened the undecaying string of that bow with which he had defended the field of Kurukshetra. And the illustrious Bhimasena unstrung that bow by means of which that sinless one had vanquished in fight the Panchalas and the lord of Sindhu, and with which, during his career of conquest, he had, single-handed, opposed innumerable foes, and hearing whose twang which was like unto the roar of the thunder or the splitting of a mountain, enemies always fly (in panic) from the field of battle. And that son of Pandu of coppery complexion and mild speech who is endued with great prowess in the field, and is called Nakula in consequence of his unexampled beauty in the family, then unfastened the string of that bow with which he had conquered all the regions of the west. And the heroic Sahadeva also, possessed of a mild disposition, then untied the string of that bow with which he had subjugated the countries of the south. And with their bows, they put together their long and flashing swords, their precious quivers, and their arrows sharp as razors. And Nakula ascended the tree, and deposited on it the bows and the other weapons. And he tied them fast on those parts of the tree which he thought would not break, and where the rain would not penetrate. And the Pandavas hung up a corpse (on the tree), knowing that people smelling the stench of the corpse would say—'here sure, is a dead body,' and avoid the tree from a distance. And on being asked by the shepherds and cowherds regarding the corpse, those repressers of foes said unto them, 'This is our mother, aged one hundred and eighty years. We have hung up her dead body, in accordance with the custom observed by our forefathers.' And then those resisters of foes approached the city. And for purposes of non-discovery Yudhishthira kept these (five) names for himself and his brothers respectively, viz., Jaya, Jayanta, Vijaya, Jayatsena, and Jayatvala. Then they entered the great city, with the view to passing the thirteenth year undiscovered in that kingdom, agreeably to the promise (to Duryodhana)."