وَعَنْ شَدَّادِ بْنِ أَوْسٍ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «إِنَّ اللَّهَ تَبَارَكَ وَتَعَالَى كَتَبَ الْإِحْسَانَ عَلَى كُلِّ شَيْءٍ فَإِذَا قَتَلْتُمْ فَأَحْسِنُوا الْقِتْلَةَ وَإِذَا ذَبَحْتُمْ فَأَحْسِنُوا الذَّبْحَ وَلْيُحِدَّ أَحَدُكُمْ شَفْرَتَهُ وَلْيُرِحْ ذَبِيحَتَهُ» . رَوَاهُ مُسلم

Shaddad b. Aus reported God’s messenger as saying, “God who is blessed and exalted has decreed that everything should be done in a good way, so when you kill use a good method, and when you cut an animal’s throat you should use a good method, for each of you should sharpen his knife and give the animal as little pain as possible.” Muslim transmitted it.