Virtues and Merits of the Prophet (pbuh) and his Companions

Bukhari :: Book 4 :: Volume 56 :: Hadith 801

Narrated Abu Huraira:

Allah's Apostle said, "This branch from Quraish will ruin the people." The companions of the Prophet asked, "What do you order us to do (then)?" He said, "I would suggest that the people keep away from them.''