Abu Dawud
Prescribed Punishments
Book Number: 033 / Hadith Number: 4345
Narated By Abdullah ibn Abbas : Abdullah ibn AbuSarh used to write (the revelation) for the Apostle of Allah (pbuh). Satan made him slip, and he joined the infidels. The Apostle of Allah (pbuh) commanded to kill him on the day of Conquest (of Mecca). Uthman ibn Affan sought protection for him. The Apostle of Allah (pbuh) gave him protection.