Sahih Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Volume: 005 / Book Number: 059 / Hadith Number: 401
Narrated Ibn 'Abbas
Allah's Wrath became severe on him whom the Prophet had killed in Allah's Cause. Allah's Wrath became severe on the people who caused the face of Allah's Prophet to bleed.