Al-Adab Al-Mufrad, Book 33, Hadith 759 (English) ⓘ
Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "When you hear a man saying, 'People are destroyed,' then he has destroyed them."
حَدَّثَنَا إِسْمَاعِيلُ قَالَ: حَدَّثَنِي مَالِكٌ، عَنْ سُهَيْلِ بْنِ أَبِي صَالِحٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللهِ صلى الله عليه وسلم قَالَ: إِذَا سَمِعْتَ الرَّجُلَ يَقُولُ: هَلَكَ النَّاسُ، فَهُوَ أَهْلَكُهُمْ.
also referenced under: Hadith 759 (Reference) & Book 33, Hadith 6 (In-Book)