Isma'il bin Abi Khalid al-Ahmsi إسماعيل بن أبي خالد الأحمسي · Chapters On Al-Fitan

"Help your brother whether he is an oppressor or oppressed." It was said: "O Messenger of Allah! I help him when he is oppressed. But how can I help him when he oppresses?" He said: "Prevent him from oppression, that is your help for him."