سنن نسائي
Sunan an-Nasa'i
كتاب الأيمان والنذور
The Book of Oaths and Vows
بَابُ : إِذَا نَذَرَ ثُمَّ أَسْلَمَ قَبْلَ أَنْ يَفِيَ
Chapter: If A Person Makes A Vow Then Becomes Muslim Before Fulfilling It
Hadith 3852
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ يَزِيدَ , قَالَ : حَدَّثَنَا سُفْيَانُ , عَنْ أَيُّوبَ , عَنْ نَافِعٍ , عَنْ ابْنِ عُمَرَ , قَالَ : كَانَ عَلَى عُمَرَ نَذْرٌ فِي اعْتِكَافِ لَيْلَةٍ فِي الْمَسْجِدِ الْحَرَامِ , فَسَأَلَ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَنْ ذَلِكَ , فَأَمَرَهُ أَنْ يَعْتَكِفَ .
´It was narrated that Ibn 'Umar said:` "Umar had made a vow to spend a night in 'Itikaf in Al-Masjid Al-Haram. He asked the Messenger of Allah about that, and he ordered him to perform the 'Itikaf."
