When Krishna visited Hastinapura as a peace emissary of the Pandavas, he shunned Duryodhana's offer to stay in the royal palace, preferring instead the home of Vidura, on account of him being the only neutral man in the Kaurava court.
In the Sanatsujatiya section of the Mahabharata, shortly before the Kurukshetra War began, Vidura invoked the sage Sanatsujata to answer Dhritarashtra's questions about death.