Al-Lu'lu Wal-Marjan 88 — The Book of Belief (Faith)

Hudhaifa Narrated from:

Once I was sitting with 'Umar رضي الله عنه and he said, "Who amongst you remembers the statement of Allâh's Messenger صلى الله عليه وسلم about the Al-Fitnah (trial and affliction etc.)?" I said, "I know it as the Prophet صلى الله عليه وسلم had said it." 'Umar said, "No doubt you are bold." I said, " Al-Fitnah caused for a man by his wife, money, children and neighbour is expiated by his Salât (prayer), Saum (fasts), charity and by enjoining Al-Ma'rûf (Islâmic Monotheism and all that Allâh has ordained) and forbidding Al-Munkar (disbelief, polytheism, and all that Allâh has forbidden.)"'Umar said, "I did not mean that but I asked about that Al-Fitnah which will spread like the waves of the sea." I (Hudhaifa) said, "O leader of the faithful believers! You need not be afraid of it as there is a closed door between you and it." 'Umar asked, "Will the door be broken or opened?" I replied, "It will be broken." 'Umar said, "Then it will never be closed again."I was asked whether 'Umar knew that door. I replied, "He knew it as one knows that there will be night before the tomorrow morning. I have narrated a Hadîth that is free from any mis-statement." The subnarrator added that they deputed Masrûq to ask Hudhaifa (about the door). Hudhaifa said, "The door was 'Umar himself."( Sahîh Al-Bukhârî, Hadîth No. 503, Vol. 1)