حَدَّثَنَا أَبُو بَكْرٍ النَّيْسَابُورِيُّ ، ثنا عَبْدُ الرَّحْمَنِ بْنُ بِشْرِ بْنِ الْحَكَمِ ، ثنا يَحْيَى بْنُ سَعِيدٍ الْقَطَّانُ ، عَنْ عُبَيْدِ اللَّهِ بْنِ عُمَرَ ، عَنْ نَافِعٍ ، عَنِ ابْنِ عُمَرَ ، أَنَّ عُمَرَ نَذَرَ أَنْ يَعْتَكِفَ لَيْلَةً فِي الْمَسْجِدِ الْحَرَامِ فِي الْجَاهِلِيَّةِ ، فَسَأَلَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ، فَقَالَ : " أَوْفِ بِنَذْرِكَ " . هَذَا إِسْنَادٌ صَحِيحٌ.
Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: Sayyiduna Umar (may Allah be pleased with him) had made a vow in the days of ignorance to perform i'tikaf for one night in Masjid al-Haram. He asked the Prophet (peace and blessings be upon him) about this, so he said: "Fulfill your vow." Its chain of narration is authentic.