Sahih Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Volume: 005 / Book Number: 059 / Hadith Number: 485
Narrated 'Abbas bin Tamim:
When it was the day (of the battle) of Al-Harra the people were giving Pledge of allegiance to Abdullah bin Hanzala. Ibn Zaid said, "For what are the people giving Pledge of allegiance to Abdullah bin Hanzala?" It was said to him, "For death." Ibn Zaid said, "I will never give the Pledge of allegiance for that to anybody else after Allah's Apostle ." Ibn Zaid was one of those who had witnessed the day of Al-Hudaibiya with the Prophet.