Mbh 1.148.3

“After the Pandavas had thus lived for ten nights, Purochana spoke to them of the mansion (he had built) called ‘The Blessed Home,’ but in reality the cursed house. Then those tigers among men, attired in costly dress, entered that mansion at the instance of Purochana like Guhyakas entering the palace (of Siva) on the Kailasa mount. The foremost of all virtuous men, Yudhishthira, inspecting the house, said unto Bhima that it was really built of inflammable materials. Smelling the scent of fat mixed with clarified butter and preparations of lac, he said unto Bhima, ‘O chastiser of foes, this house is truly built of inflammable materials! Indeed, it is apparent that such is the case! The enemy, it is evident, by the aid of trusted artists well-skilled in the construction of houses, have finely built this mansion, after procuring hemp, resin, heath, straw, and bamboos, all soaked in clarified butter. This wicked wretch, Purochana, acting under the instruction of Duryodhana, stayeth here with the object of burning me to death when he seeth me trustful. But, O son of Pritha, Vidura of great intelligence, knew of this danger, and, therefore, hath warned me of it beforehand. Knowing it all, that youngest uncle of ours, ever wishing our good from affection hath told us that this house, so full of danger, hath been constructed by the wretches under Duryodhana acting in secrecy.’