Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
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:19791 – Abū Zakariyyā b. Abū Isḥāq al-Muzakkī > Abū Jaʿfar Muḥammad b. ʿAlī b. Duḥaym al-Shaybānī > Aḥmad b. Ḥāzim > ʿUbaydullāh b. Mūsá Fadhakar Isnādah Illā > Ṣabr al-Rūḥ And ʾIkhṣāʾ al-Bahāʾim Ṣabr Shadīd

[Machine] The sheikh's saying and the castration of animals is extreme patience, similar to what is forbidden from the patience of the soul, and it is from the saying of Al-Zuhri.  

البيهقي:١٩٧٩١ – وَقَدْ أَخْبَرَنَا أَبُو زَكَرِيَّا بْنُ أَبِي إِسْحَاقَ الْمُزَكِّي ثنا أَبُو جَعْفَرٍ مُحَمَّدُ بْنُ عَلِيِّ بْنِ دُحَيْمٍ الشَّيْبَانِيُّ ثنا أَحْمَدُ بْنُ حَازِمٍ ثنا عُبَيْدُ اللهِ بْنُ مُوسَى فَذَكَرَ إِسْنَادَهُ إِلَّا أَنَّهُ قَالَ عَنْ صَبْرِ الرُّوحِ وَإِخْصَاءُ الْبَهَائِمِ صَبْرٌ شَدِيدٌ قَالَ

الشَّيْخُ قَوْلُهُ وَإِخْصَاءُ الْبَهَائِمِ صَبْرٌ شَدِيدٌ قِيَاسٌ عَلَى مَا نُهِيَ عَنْهُ مِنْ صَبْرِ الرُّوحِ وَهُوَ مِنْ قَوْلِ الزُّهْرِيِّ فَقَدْ  

رَوَاهُ غَيْرُ عُبَيْدِ اللهِ عَنِ ابْنِ أَبِي ذِئْبٍ مُرْسَلًا وَجَعَلَ الْكَلَامَ فِي الْإِخْصَاءِ مِنْ قَوْلِ الزُّهْرِيِّ