(11) باب الأَمْرِ بِإِحْسَانِ الذَّبْحِ وَالْقَتْلِ وَتَحْدِيدِ الشَّفْرَةِ
Shaddid b. Aus said:
Two are the things which I remember Allah's Messenger (ﷺ) having said: Verily Allah has enjoined goodness to everything; so when you kill, kill in a good way and when you slaughter, slaughter in a good way. So every one of you should sharpen his knife, and let the slaughtered animal die comfortably.
Reference: Sahih Muslim 1955 a
In-book reference: Book 34, Hadith 84
USC-MSA web (English) reference(deprecated numbering scheme): Book 21, Hadith 4810