This honorable Surah was revealed after the Messenger of Allah returned from the area of Al-Hudaybiyyah, during the month of Dhul-Qa`dah, in the sixth year of Hijrah.
There is a Difference between a Believer and a Muslim, Allah the Exalted chastises the bedouins who, when they embraced Islam, claimed for themselves the grade of faithful believers. However, Faith had not yet firmly entered their hearts.
All of Mankind are the Children of `Adam and Hawwa(Eve)'. Allah the Exalted declares to mankind that He has created them all from a single person, `Adam, and from that person He created his mate, Hawwa'. From their offspring He made nations.
The Prohibition of Unfounded Suspicion. Allah the Exalted forbids His faithful servants from being suspicious, which includes having doubts and suspicions about the conduct of one's family, relatives and other people in general. Therefore, Muslims are to avoid suspicion without foundation.