From Sahih Bukhari (Hadith 3604):
Narrated Abu Huraira:Allah's Messenger (ﷺ) said, "This branch from Quraish will ruin the people." The companions of the Prophet (ﷺ) asked, "What do you order us to do (then)?" He said, "I would suggest that the people keep away from them
Reference: Bukhari 3604