Hadith 3604
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.''
Hadith 5014
Narrated Abu Said Al-Khudri: My brother, Qatada bin An-Nau'man said, "A man performed the night prayer late at night in the lifetime of the Prophet and he read: 'Say: He is Allah, (the) One,' (112.1) and read nothing besides that. The next morning a man went to the Prophet ,~ and told him about that . (The Prophet replied the same as (in Hadith 532) above.)