It is narrated from Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) was distributing dates on the day of Hunayn when a man came to him and said: O Muhammad, be just! He (peace and blessings be upon him) said: "Woe to you! If I do not act justly, then who else will act justly for you?" Or he said: "With whom will you seek justice after me?" Then he (peace and blessings be upon him) said: "Soon people like this man will appear who will ask (in the name of) the Book of Allah while they are its enemies; they will recite the Book of Allah, and their heads will be shaved. So when they come out (in rebellion), strike their necks." This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it with this wording.