Indeed, Allah has prescribed excellence in everything

Shadid ibn Aws said: I remember two things the Messenger of Allah صلى الله عليه وسلم said, “Indeed, Allah has prescribed excellence in everything; so if you kill, then kill well; and if you slaughter, then slaughter well. Let one of you sharpen his knife so his animal feels no pain.”

[Sahih Muslim, Book 21, Number 4810]

Book of Hunting and Gaming, Chapter: The command of excellence in slaughtering and killing

شَدَّادِ بْنِ أَوْسٍ قَالَ ثِنْتَانِ حَفِظْتُهُمَا عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ إِنَّ اللَّهَ كَتَبَ الْإِحْسَانَ عَلَى كُلِّ شَيْءٍ فَإِذَا قَتَلْتُمْ فَأَحْسِنُوا الْقِتْلَةَ وَإِذَا ذَبَحْتُمْ فَأَحْسِنُوا الذَّبْحَ وَلْيُحِدَّ أَحَدُكُمْ شَفْرَتَهُ فَلْيُرِحْ ذَبِيحَتَهُ

كِتَاب الصَّيْدِ وَالذَّبَائِحِ وَمَا يُؤْكَلُ مِنْ الْحَيَوَانِ – بَاب الْأَمْرِ بِإِحْسَانِ الذَّبْحِ وَالْقَتْلِ وَتَحْدِيدِ الشَّفْرَةِ