عَن أبي وَافد اللَّيْثِيّ
قَالَ: قَدِمَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ الْمَدِينَةَ وَهُمْ يَجُبُّونَ أَسْنِمَةَ الْإِبِلِ وَيَقْطَعُونَ أَلْيَاتِ الْغَنَمِ فَقَالَ: «مَا يُقْطَعُ مِنَ الْبَهِيمَةِ وَهِيَ حَيَّةٌ فَهِيَ مَيْتَةٌ لَا تُؤْكَلُ»
Abu Waqid al-Laithi told that when the Prophet (sallallahu alayhi wa sallam) came to Medina the people used to cut off camels humps and cut the fat tails of sheep, so he said, “Whatever is cut off an animal when it is alive is dead* and must not be eaten.” *i.e. it is treated as something which had died a natural death, and therefore may not be lawfully eaten.
Mishkat al-Masabih 3930, Book 21, Game and Animals Which May Be Slaughtered, Hadith 31. 1 min read