´Narrated Abu Waqid Al-Laithi:` "The Prophet (ﷺ) came to Al-Madinah and they were in the habit of cutting the humps off of the camels and cutting the buttocks from the sheep. He said: 'Whatever is cut from an animal while it is alive, then it is dead flesh.'"
Hadith Referenceسنن ترمذي / كتاب الصيد والذبائح عن رسول الله صلى الله عليه وسلم / 1480