The Mahabharata: Virata Parva

"Listen, O lord of men, how thy great grandfathers passed the period of unrecognition in the city of Virata. Having in this way obtained boons from the god of Justice, that best of virtuous men, Yudhishthira, returned to the asylum and related unto the Brahmanas all that had happened. And having related everything unto them, Yudhishthira restored to that regenerate Brahmana who had followed him the churning staff and the fire-sticks he had lost. And, O Bharata, the son of the god of Justice, the royal Yudhishthira of high soul then called together all his younger brothers and addressed them, saying, 'Exiled from our kingdom, we have passed twelve years. The thirteenth year, hard to spend, hath now come. Do thou therefore, O Arjuna, the son of Kunti, select some spot where we may pass our days undiscovered by our enemies.'