مسند أحمد

It was narrated that Abut-Tufail said: ‘Ali was asked: Did the Messenger of Allah (ﷺ) tell you anything that was only for you? He said. He did not tell us anything that was only for us without telling all other people, except that which is in the sheath of this sword of mine. He brought out a document on which it was written: `May Allah curse the one who slaughters in the name of something other than Allah, may Allah curse the one who steals the boundary markers, may Allah curse the one who curses his father and may Allah curse the one who gives refuge to an offender.”