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:19794 – Abū al-Ḥusayn b. Bishrān> Ismāʿīl b. Muḥammad al-Ṣaffār > al-Ḥasan b. ʿAlī b. ʿAffān > ʿAbdullāh b. Numayr > ʿUbaydullāh b. ʿUmar > Nāfiʿ > Ibn ʿUmar

[Machine] He hated castrating animals and would say, "Do not cut off the testicles of Allah's creation. This is the correct way, it is proven and narrated as an elevated saying."  

البيهقي:١٩٧٩٤ – أَخْبَرَنَا أَبُو الْحُسَيْنِ بْنُ بِشْرَانَ بِبَغْدَادَ ثنا إِسْمَاعِيلُ بْنُ مُحَمَّدٍ الصَّفَّارُ ثنا الْحَسَنُ بْنُ عَلِيِّ بْنِ عَفَّانَ ثنا عَبْدُ اللهِ بْنُ نُمَيْرٍ عَنْ عُبَيْدِ اللهِ بْنِ عُمَرَ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ ؓ أَنَّهُ

كَانَ يَكْرَهُ إِخْصَاءَ الْبَهَائِمِ وَيَقُولُ لَا تَقْطَعُوا نَامَيَةَ خَلْقِ اللهِ ﷻ هَذَا هُوَ الصَّحِيحُ مَوْقُوفٌ وَقَدْ رُوِيَ مَرْفُوعًا