«انصر أخاك ظالما أو مظلوما قيل: كيف أنصره ظالما؟ قال: تحجزه عن الظلم فإن ذلك نصره»
The Prophet (peace and blessings be upon him) said:
"Help your brother, whether he is an oppressor or oppressed." It was asked: "How should I help him when he is an oppressor?" He (peace and blessings be upon him) said: "Stop him from committing oppression; that (in reality) is helping him."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 1502