The Messenger of Allah ﷺ said, "Help your brother whether he is the wrongdoer or the wronged."Someone asked, "Messenger of Allah, I understand helping him when he is wronged, but how do I help him when he is the wrongdoer?"He replied, "You restrain him and prevent him from wrongdoing. That is how you help him."
حدثنا هشيم قال عبيد الله بن أبي بكر أخبرنا عن أنس ويونس
قال رسول الله ﷺ انصر أخاك ظالما أو مظلوما قيل يا رسول الله هذا أنصره مظلوما فكيف أنصره إذا كان ظالما قال تحجزه تمنعه فإن ذلك نصره