Muhammad bin Rabi'ya al-Klaby محمد بن ربيعة الكلابي · The Book on Blood Money

that the Prophet (ﷺ) said: "Indeed Allah has decreed Ihsan in everything. So when you kill, then do the killing well, and when you slaughter, then do the slaughtering well. Let one of you sharpen his blade, and let him comfort his animal (before slaughtering)."