Hadith
Hadith on Brotherhood
عَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: الْمُسْلِمُ أَخُو الْمُسْلِمِ لَا يَظْلِمُهُ وَلَا يُسْلِمُهُ
Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said, "A Muslim is the brother of another Muslim. He does not oppress him, nor does he hand him over to an oppressor."
Reference: Sahih al-Bukhari, Book 46, Hadith 6951