Volume 5 · Book 59 · Hadith 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.
— Sahih Bukhari, Volume 5, Book 59: Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi), Hadith #401