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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:9133 – Aḥmad b. al-Ḥasan al-Qāḍī > Abū al-ʿAbbās al-Aṣam > al-Rabīʿ > al-Shāfiʿī > Saʿīd b. Sālim > Ibn Jurayj > ʿAṭāʾ > Ṣafwān b. Yaʿlá > Abīh Yaʿlá b. Umayyah > Baynamā ʿUmar b. al-Khaṭṭāb Yaghtasil > Baʿīr > Astar ʿAlayh Bithawb Idh > ʿUmar b. al-Khaṭṭāb Yā Yaʿlá Āṣbub > Raʾsī > Amīr al-Muʾminīn Aʿlam > ʿUmar

[Machine] Omar ibn Al-Khattab, by Allah, pouring more water on hair only makes it more tangled. So, he invoked Allah and poured it onto his head.  

البيهقي:٩١٣٣ – وَأَخْبَرَنَا أَحْمَدُ بْنُ الْحَسَنِ الْقَاضِي ثنا أَبُو الْعَبَّاسِ الْأَصَمُّ أنبأ الرَّبِيعُ أنبأ الشَّافِعِيُّ أنبأ سَعِيدُ بْنُ سَالِمٍ عَنِ ابْنِ جُرَيْجٍ أَخْبَرَنِي عَطَاءٌ أَنَّ صَفْوَانَ بْنَ يَعْلَى أَخْبَرَهُ عَنْ أَبِيهِ يَعْلَى بْنِ أُمَيَّةَ أَنَّهُ قَالَ بَيْنَمَا عُمَرُ بْنُ الْخَطَّابِ ؓ يَغْتَسِلُ إِلَى بَعِيرٍ وَأَنَا أَسْتَرُ عَلَيْهِ بِثَوْبٍ إِذْ قَالَ عُمَرُ بْنُ الْخَطَّابِ ؓ يَا يَعْلَى اصْبُبْ عَلَى رَأْسِي فَقُلْتُ أَمِيرُ الْمُؤْمِنِينَ أَعْلَمُ فَقَالَ

عُمَرُ بْنُ الْخَطَّابِ ؓ وَاللهِ مَا يَزِيدُ الْمَاءُ الشَّعْرَ إِلَّا شَعَثًا فَسَمَّى اللهَ ثُمَّ أَفَاضَ عَلَى رَأْسِهِ