Sayyiduna Abdullah bin Busr (may Allah be pleased with him) narrates: Long ago I heard a hadith: When you are among twenty people, or (they are) fewer than that or more, and you look carefully at their faces and do not see among them a single man who is held in awe for the sake of Allah Almighty, then know that the matter has become weak.
Ahmad and al-Tabarani recorded it, and Ahmad's chain is jayyid (good).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الفتن - أعاذنا الله منها / 12178