It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: When you hear a man saying that the people are ruined, then know that he is the most ruined among them.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 8514
Hadith Gradingحکم دارالسلام:إسنادہ صحیح ، م : 2623