Sahih al-Bukhari 1895
Narrated Abu Wail from Hudhaifa:
`Umar asked the people, "Who remembers the narration of the Prophet (ﷺ) about the affliction?" Hudhaifa 
said, "I heard the Prophet (ﷺ) saying, 'The affliction of a person in his property, family and neighbors is 
expiated by his prayers, fasting, and giving in charity." `Umar said, "I do not ask about that, but I ask 
about those afflictions which will spread like the waves of the sea." Hudhaifa replied, "There is a 
closed gate in front of those afflictions." `Umar asked, "Will that gate be opened or broken?" He 
replied, "It will be broken." `Umar said, "Then the gate will not be closed again till the Day of 
Resurrection." We said to Masruq, "Would you ask Hudhaifa whether `Umar knew what that gate 
symbolized?" He asked him and he replied "He (`Umar) knew it as one knows that there will be night 
before tomorrow, morning.
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا سُفْيَانُ، حَدَّثَنَا جَامِعٌ، عَنْ أَبِي وَائِلٍ، عَنْ حُذَيْفَةَ، قَالَ قَالَ عُمَرُ ـ رضى الله عنه ـ مَنْ يَحْفَظُ حَدِيثًا عَنِ النَّبِيِّ صلى الله عليه وسلم فِي الْفِتْنَةِ قَالَ حُذَيْفَةُ أَنَا سَمِعْتُهُ يَقُولُ ‏
"‏ فِتْنَةُ الرَّجُلِ فِي أَهْلِهِ وَمَالِهِ وَجَارِهِ تُكَفِّرُهَا الصَّلاَةُ وَالصِّيَامُ وَالصَّدَقَةُ ‏"‏‏.‏ قَالَ لَيْسَ أَسْأَلُ عَنْ ذِهِ، إِنَّمَا أَسْأَلُ عَنِ الَّتِي تَمُوجُ كَمَا يَمُوجُ الْبَحْرُ‏.‏ قَالَ وَإِنَّ دُونَ ذَلِكَ بَابًا مُغْلَقًا‏.‏ قَالَ فَيُفْتَحُ أَوْ يُكْسَرُ قَالَ يُكْسَرُ‏.‏ قَالَ ذَاكَ أَجْدَرُ أَنْ لاَ يُغْلَقَ إِلَى يَوْمِ الْقِيَامَةِ‏.‏ فَقُلْنَا لِمَسْرُوقٍ سَلْهُ أَكَانَ عُمَرُ يَعْلَمُ مَنِ الْبَابُ فَسَأَلَهُ فَقَالَ نَعَمْ، كَمَا يَعْلَمُ أَنَّ دُونَ غَدٍ اللَّيْلَةَ‏.‏