Abu Wa'il narrated from Hudhaifah that 'Umar said:
Which of you remembers what the Messenger of Allah(s.a.w) said about the Fitnah? So Hudhaifah said: I do. Hudhaifah said: A man's Fitnah is in his family, his wealth, his children, and his neighbors. It is atoned for by the Salat, fasting, charity, and by commanding good and forbidding evil. 'Umar said: I am not asking you about this. Rather, about the Fitnah that spreads like the waves of the sea. He said: O Commander of the Believers! Between you and it is a closed door. 'Umar said: Will it be opened or broken? He said: It will be broken. He said: Then it will never be closed until the Day of Judgement.