Sahih Bukhari
Merits of the Helpers in Madinah (Ansaar)
Volume: 005 / Book Number: 058 / Hadith Number: 202
Narrated Qais:
I heard Said bin Zaid bin 'Amr bin Nufail saying in the mosque of Al-Kufa. "By Allah, I have seen myself tied and forced by 'Umar to leave Islam before 'Umar himself embraced Islam. And if the mountain of Uhud could move from its place for the evil which you people have done to 'Uthman, then it would have the right to move from its place."