Ahadith :

“Beware of suspicion, for suspicion is the falsest of talk. And do not snoop, pry, nor envy, cut, or hate each other, but be brothers, O servants of God.” (Al-Bukhari)

The major sins are associating other objects of worship with Allah, disobedience to     parents, murder, and deliberate perjury.        (Bukhari, Muslim).