Mbh 1.149.2a

“Vaisampayana continued, ‘A friend of Vidura’s, well-skilled in mining, coming unto the Pandavas, addressed them in secret, saying, ‘I have been sent by Vidura and am a skilful miner. I am to serve the Pandavas. Tell me what I am to do for ye. From the trust he reposeth in me Vidura hath said unto me, ‘Go thou unto the Pandavas and accomplish thou their good. What shall I do for you? Purochana will set fire to the door of thy house on the fourteenth night of this dark fortnight. To burn to death those tigers among men, the Pandavas, with their mother, is the design of that wicked wretch, the son of Dhritarashtra. O son of Pandu, Vidura also told thee something in the Mlechchha tongue to which thou also didst reply in same language. I state these particulars as my credentials.’ Hearing these words, Yudhishthira, the truthful son of Kunti replied, ‘O amiable one, I now know thee as a dear and trusted friend of Vidura, true and ever devoted to him. There is nothing that the learned Vidura doth not know. As his, so ours art thou. Make no difference between him and us. We are as much thine as his. O, protect us as the learned Vidura ever protecteth us. I know that this house, so inflammable, hath been contrived for me by Purochana at the command of Dhritarashtra’s son. That wicked wretch commanding wealth and allies pursueth us without intermission. O, save us with a little exertion from the impending conflagration. If we are burnt to death here, Duryodhana’s most cherished desire will be satisfied. Here is that wretch’s well-furnished arsenal. This large mansion hath been built abutting the high ramparts of the arsenal without any outlet. But this unholy contrivance of Duryodhana was known to Vidura from the first, and he it was who enlightened us beforehand. The danger of which Kshattri had foreknowledge is now at our door. Save us from it without Purochana’s knowledge thereof.’