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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
abudawud:1961 – Muḥammad b. al-ʿAlāʾ > Ibn al-Mubārak > Maʿmar > al-Zuhrī > ʿUthmān Innamā Ṣallá Biminá Arbaʿ

Uthman prayed four rak'ahs at Mina because he resolved to stay there after hajj.  

أبو داود:١٩٦١ – حَدَّثَنَا مُحَمَّدُ بْنُ الْعَلاَءِ أَخْبَرَنَا ابْنُ الْمُبَارَكِ عَنْ مَعْمَرٍ عَنِ الزُّهْرِيِّ أَنَّ عُثْمَانَ إِنَّمَا صَلَّى بِمِنًى أَرْبَعًا

لأَنَّهُ أَجْمَعَ عَلَى الإِقَامَةِ بَعْدَ الْحَجِّ