Arabic (Original)
حَدَّثَنَا هُشَيْمٌ قَالَ عُبَيْدُ اللَّهِ بْنُ أَبِي بَكْرٍ أَخْبَرَنَا عَنْ أَنَسٍ وَيُونُسُ عَنْ الْحَسَنِ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ انْصُرْ أَخَاكَ ظَالِمًا أَوْ مَظْلُومًا قِيلَ يَا رَسُولَ اللَّهِ هَذَا أَنْصُرُهُ مَظْلُومًا فَكَيْفَ أَنْصُرُهُ إِذَا كَانَ ظَالِمًا قَالَ تَحْجُزُهُ تَمْنَعُهُ فَإِنَّ ذَلِكَ نَصْرُهُ.
English Translation
Hushaym told us: Ubaydullah ibn Abi Bakr informed us, from Anas, and Yunus, from al-Hasan, who said: The Messenger of Allah (peace and blessings be upon him) said: "Help your brother, whether he is a wrongdoer or wronged." It was said: "O Messenger of Allah, I can help him if he is wronged, but how do I help him if he is a wrongdoer?" He said: "You restrain him, you prevent him [from wrongdoing] - that is helping him."