Unity: A religious duty

The Qur’an says, “Hold fast, all together, to Allah’s cord, and do not be divided.” [Qur’an, 3:103] Holding fast to Allah’s cord is every Muslim’s duty, but the Qur’an does not consider advising people to hold fast to Allah’s cord to be enough. It tells us to hold fast as a community and says, “all together.” This community spirit and unity is another religious obligation.
Imam Khamenei [Aug. 21, 2006]