In the Name of Allah , the Compassionate , the Merciful
Imam Amir ul Mu'mineen Ali [a] said: "Ask others to do good; you will thus be among the good doers. Desist others from evil with your action as well as your speech, and stay away, to the best of your ability, from he who commits it. Struggle for Allah as is His due; and the reviling of a reviler should not deter you in matters of Allah. Leap into danger for the sake of right wherever it may be."
Nahjul Balagha, p. 392 letter 31