“Allah has prescribed Al-Ihsan (proficiency) in all things. So if you kill, then kill well, and if you slaughter, then slaughter well. Let one of you sharpen his blade and spare suffering to the animal he slaughters.”  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِنَّ اللَّهَ ﷻ كَتَبَ الإِحْسَانَ عَلَى كُلِّ شَىْءٍ فَإِذَا قَتَلْتُمْ فَأَحْسِنُوا الْقِتْلَةَ وَإِذَا ذَبَحْتُمْ فَأَحْسِنُوا الذَّبْحَ وَلْيُحِدَّ أَحَدُكُمْ شَفْرَتَهُ وَلْيُرِحْ ذَبِيحَتَهُ  

“The Prophet ﷺ passed by a man who was dragging a sheep by its ear. He said: ‘Leave its ear alone and hold it by the sides of its neck.’”  

مَرَّ النَّبِيُّ ﷺ بِرَجُلٍ وَهُوَ يَجُرُّ شَاةً بِأُذُنِهَا فَقَالَ دَعْ أُذُنَهَا وَخُذْ بِسَالِفَتِهَا  

“The Messenger of Allah ﷺ commanded that the blade should be sharpened, and hidden from the animals, and he said: ‘When one of you slaughters, let him do it quickly.’” Another chain reports the same.  

أَمَرَ رَسُولُ اللَّهِ ﷺ بِحَدِّ الشِّفَارِ وَأَنْ تُوَارَى عَنِ الْبَهَائِمِ وَقَالَ إِذَا ذَبَحَ أَحَدُكُمْ فَلْيُجْهِزْ حَدَّثَنَا جَعْفَرُ بْنُ مُسَافِرٍ حَدَّثَنَا أَبُو الأَسْوَدِ حَدَّثَنَا ابْنُ لَهِيعَةَ عَنْ يَزِيدَ بْنِ أَبِي حَبِيبٍ عَنْ سَالِمٍ عَنْ أَبِيهِ عَنِ النَّبِيِّ ﷺ مِثْلَهُ