In the beauty of the sacrifice.

Muḥammad b. Yūsuf > Sufyān > Khālid al-Ḥadhhāʾ > Abū Qilābah > Abū al-Ashʿath al-Ṣanʿānī > Shaddād b. Aws

There are two characteristics that I heard the Messenger of Allah ﷺ say: Allah has decreed that everything should be done in a good way, so when you kill use a good method. The version of the narrators other than Muslim says: "So kill in a good manner." And when you slaughter, you should use a good method, for one of you should sharpen his knife, and give the animal as little pain as possible. – Sound Chain

حَدَّثَنَا مُحَمَّدُ بْنُ يُوسُفَ عَنْ سُفْيَانَ عَنْ خَالِدٍ الْحَذَّاءِ عَنْ أَبِي قِلَابَةَ عَنْ أَبِي الْأَشْعَثِ الصَّنْعَانِيِّ عَنْ شَدَّادِ بْنِ أَوْسٍ قَالَ

حَفِظْتُ مِنْ رَسُولِ اللَّهِ ﷺ اثْنَتَيْنِ قَالَ «إِنَّ اللَّهَ كَتَبَ عَلَيْكُمُ الْإِحْسَانَ فَإِذَا قَتَلْتُمْ فَأَحْسِنُوا الْقِتْلَةَ وَإِذَا ذَبَحْتُمْ فَأَحْسِنُوا الذَّبْحَ وَلْيُحِدَّ أَحَدُكُمْ شَفْرَتَهُ ثُمَّ لِيُرِحْ ذَبِيحَتَهُ» – إسناده صحيح