Hadith on Excellence: Allah has prescribed excellence in all things

Shaddad ibn Aws reported: The Messenger of Allah, peace and blessings be upon him, said, “Verily, Allah has prescribed excellence in everything. If you have to kill, then kill in the best manner. If you have to slaughter, then slaughter in the best manner. Let one of you sharpen his knife so his animal is spared of suffering.

Source: Ṣaḥīḥ Muslim 1955

Grade: Sahih (authentic) according to Muslim

عن شداد بن أوس 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

1955 صحيح مسلم كتاب الصيد والذبائح وما يؤكل من الحيوان باب الأمر بإحسان الذبح والقتل وتحديد الشفرة