Holy Quran » AN NAHL : 126

And if you punish [an enemy, O believers], punish with an equivalent of that with which you were harmed. But if you are patient - it is better for those who are patient.

{ وإن عاقبتم فعاقبوا بمثل ما عوقبتم به ولئن صبرتم } عن الانتقام { لهو } أي الصبر { خير للصابرين } فكف صلى الله عليه وسلم وكفَّر عن يمينه رواه البزار .