Sahih Bukhari Volume 4, Book 57, Hadith 3145

حَدَّثَنَا أَبُو النُّعْمَانِ، حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ أَيُّوبَ، عَنْ نَافِعٍ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ ـ رضى الله عنه ـ قَالَ يَا رَسُولَ اللَّهِ إِنَّهُ كَانَ عَلَىَّ اعْتِكَافُ يَوْمٍ فِي الْجَاهِلِيَّةِ، فَأَمَرَهُ أَنْ يَفِيَ بِهِ‏.‏ قَالَ وَأَصَابَ عُمَرُ جَارِيَتَيْنِ مِنْ سَبْىِ حُنَيْنٍ، فَوَضَعَهُمَا فِي بَعْضِ بُيُوتِ مَكَّةَ ـ قَالَ ـ فَمَنَّ رَسُولُ اللَّهِ صلى الله عليه وسلم عَلَى سَبْىِ حُنَيْنٍ، فَجَعَلُوا يَسْعَوْنَ فِي السِّكَكِ فَقَالَ عُمَرُ يَا عَبْدَ اللَّهِ، انْظُرْ مَا هَذَا فَقَالَ مَنَّ رَسُولُ اللَّهِ صلى الله عليه وسلم عَلَى السَّبْىِ‏.‏ قَالَ اذْهَبْ فَأَرْسِلِ الْجَارِيَتَيْنِ‏.‏ قَالَ نَافِعٌ وَلَمْ يَعْتَمِرْ رَسُولُ اللَّهِ صلى الله عليه وسلم مِنَ الْجِعْرَانَةِ وَلَوِ اعْتَمَرَ لَمْ يَخْفَ عَلَى عَبْدِ اللَّهِ‏.‏ وَزَادَ جَرِيرُ بْنُ حَازِمٍ عَنْ أَيُّوبَ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ قَالَ مِنَ الْخُمُسِ‏.‏ وَرَوَاهُ مَعْمَرٌ عَنْ أَيُّوبَ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ فِي النَّذْرِ وَلَمْ يَقُلْ يَوْمَ‏

Narrated By Nafi : 'Umar bin Al-Khattab said, "O Allah's Apostle! I vowed to observe Itikaf for one day during the Pre-Islamic period." The Prophet ordered him to fulfil his vow. 'Umar gained two lady captives from the war prisoners of Hunain and he left them in some of the houses at Mecca. When Allah's Apostle freed the captives of Hunain without ransom, they came out walking in the streets. 'Umar said (to his son), "O Abdullah! See what is the matter." 'Abdullah replied, "Allah's Apostle has freed the captives without ransom." He said (to him), "Go and set free those two slave girls." (Nafi added:) Allah's Apostle did not perform the 'Umra from Al-Jarana, and if he had performed the 'Umra, it would not have been hidden from 'Abdullah.