Adi bin Adi al-Kindi has transmitted this statement of Mujahid: My master narrated this hadith to me, that he heard his grandfather say: I heard the Prophet (peace and blessings be upon him) say: "Indeed, Allah Almighty does not punish the common people for the deeds of the elite until the situation is that they (that is, the common people) see evil among them and have the ability to denounce it, yet do not denounce it. When they do that, Allah Almighty punishes the elite and the common people (all of them)."
Ahmad recorded it through two routes, one of which is this, and the other is from Adi bin Adi, who said: My master narrated this hadith to me, and that is the correct one. Al-Tabarani recorded it in the same way. Its chain contains a narrator who is not named, and the narrators of one of its two chains are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الفتن - أعاذنا الله منها / 12137