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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bayhaqi:10090 – Abū ʿAbdullāh al-Ḥāfiẓ > Abū ʿAbdullāh al-Aṣbahānī > al-Ḥasan b. al-Jahm > al-Ḥusayn b. al-Faraj > al-Wāqidī > ʿAbdullāh b. Nāfiʿ from his father > Ibn ʿUmar

[Machine] This 'Umrah was not obligatory, but it was a condition for the Muslims to perform it in the month when the polytheists prevented them.  

البيهقي:١٠٠٩٠ – وَأَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ أنا أَبُو عَبْدِ اللهِ الْأَصْبَهَانِيُّ أنا الْحَسَنُ بْنُ الْجَهْمِ ثنا الْحُسَيْنُ بْنُ الْفَرَجِ ثنا الْوَاقِدِيُّ حَدَّثَنِي عَبْدُ اللهِ بْنُ نَافِعٍ عَنْ أَبِيهِ عَنِ ابْنِ عُمَرَ قَالَ

لَمْ تَكُنْ هَذِهِ الْعُمْرَةُ قَضَاءً وَلَكِنْ كَانَ شَرْطًا عَلَى الْمُسْلِمِينَ أَنْ يَعْتَمِرُوا قَابِلَ فِي الشَّهْرِ الَّذِي صَدَّهُمُ الْمُشْرِكُونَ فِيهِ