حَدَّثَنِي مَالِكٌ، أَنَّهُ بَلَغَهُ أَنَّ أُمَّ سَلَمَةَ، زَوْجَ النَّبِيِّ صلى الله عليه وسلم قَالَتْ يَا رَسُولَ اللَّهِ أَنَهْلِكُ وَفِينَا الصَّالِحُونَ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ نَعَمْ إِذَا كَثُرَ الْخَبَثُ ‏"‏ ‏.‏

Malik related to me that he had heard that Umm Salama, the wifeof the Prophet, may Allah bless him and grant him peace, said,"Messenger of Allah! Shall we be destroyed while there are people whoare salih among us?" The Messenger of Allah, may Allah bless him andgrant him peace, said, "Yes, if there is much wickedness." Translation Not Available

Book reference: Muwatta Imam Malik Book 56 Hadith 1835
Web reference: Muwatta Imam Malik Book 56 Hadith 22