Zahdam al-Jarmi (may Allah have mercy on him) narrates that Sayyiduna Ibn Abbas (may Allah be pleased with them both) addressed us and said: "Had the people not sought retribution for the blood of Uthman (may Allah be pleased with him), they would have been pelted with stones from the sky."
Hadith Referenceالمعجم الأوسط / باب الحاء / 3453
Hadith Takhrij«أخرجه الطبراني فى «الكبير» برقم: 122»