وَحَدَّثَنِي مَالِكٌ، عَنْ سُهَيْلِ بْنِ أَبِي صَالِحٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ إِذَا سَمِعْتَ الرَّجُلَ يَقُولُ هَلَكَ النَّاسُ ‏.‏ فَهُوَ أَهْلَكُهُمْ ‏"‏ ‏.‏

Malik related to me from Suhayl ibn Abu Salih from his fatherfrom Abu Hurayra that the Messenger of Allah, may Allah bless him andgrant him peace, said, "When you hear a man say, 'The people areruined,' he himself is the most ruined of them all." Translation Not Available

Book reference: Muwatta Imam Malik Book 56 Hadith 1815
Web reference: Muwatta Imam Malik Book 56 Hadith 2