Verse of Brotherhood
The Verse of Brotherhood is the tenth verse of the Quranic chapter "Al-Hujurat". The verse is about the brotherhood of believers with each other; which says: "the believers are but brothers, so make settlement between your brothers. And fear Allah that you may receive mercy."
Fundamental Islamic society motto is the believers are nothing else than brethren. The verse refers to equality between individuals and lack of difference in terms of ethnic group, tribe and race. It is suggested that the verse refers to the necessity of reforming between religious brothers. Brotherhood of believers in religion is another conception of the verse.
Twelver Shias believe that Muhammad instituted brotherhood between the emigrants and helpers, and he chose Ali as his own brother. According to them, this happened after the revelation of the verse of brotherhood.
English translation of the verse
إِنَّمَا الْمُؤْمِنُونَ إِخْوَةٌ فَأَصْلِحُوا بَيْنَ أَخَوَيْكُمْ ۚ وَاتَّقُوا اللَّهَ لَعَلَّكُمْ تُرْحَمُونَThe believers are nothing else than brothers. Therefore, make peace between your brethren and observe your duty to Allah that haply ye may obtain mercy.