(22) باب الأَمْرِ بِإِحْدَادِ الشَّفْرَةِ
It was narrated that Shaddad bin Aws said:
"There are two things that I memorized from the Messenger of Allah, who said: 'Allah has decreed proficiency in all things, so when you kill, kill well, and when you slaughter, slaughter well. Let one of you sharpen his blade and spare suffering to the animal he slaughters.'" (Sahih)
Reference: Sunan an-Nasa'i 4405
In-book reference: Book 43, Hadith 45
English translation: Vol. 5, Book 43, Hadith 4410