Abu Dawud

Benefits and Issues:
That is, it is reported regarding the Arabs
that they would cut off a piece from a sheep,
and apply medicine to the wound.
In this way, the animal would remain alive and they would also eat the meat.
But the Shari‘ah has declared this to be carrion,
meaning it is forbidden (haram).
And in the Book of Hunting (Kitab al-Sayd), the relevance of this hadith is as follows:
If a hunting dog, or an arrow, or a bullet, etc., has separated a part of the animal, and if the soul (life) departs in that very state, then both pieces are lawful (halal).
But if the soul has not departed and a part has already been separated,
and then the animal is being slaughtered, then one should exercise caution regarding eating the part that was separated before slaughter.
Otherwise, since the name of Allah (Bismillah) has already been recited at the time of striking the target,
that part may also be eaten.

Explanation:
1:
That is, the part cut from a living animal without slaughtering it is just as forbidden and unlawful as other dead animals are forbidden. Therefore, eating that severed part is not permissible. This was a practice from the time of ignorance (Jahiliyyah). The Prophet (sallallahu alayhi wa sallam) forbade it.

Lexical Explanation:
«مَا قُطِعَ» here is a relative pronoun, and «مَا» is a passive past tense verb, meaning whatever is cut off from the body of a living animal.
«الْبَهِيمَةِ» refers to every four-legged animal, except those that tear and rend (i.e., predatory animals).
«وَهِيَ حَيَّةٌ» contains the “waw” of circumstance, meaning in the state that it has not been slaughtered, but rather is still alive.
«فَهُوَ» refers to that piece which is cut off and separated from a living animal.
«مَيِّتٌ» is considered as carrion (maytah), its consumption is forbidden, and it is impure (najis). It is also included among those impurities that render water and other things impure.

Benefit:
The people of the Age of Ignorance (Jahiliyyah) used to cut off pieces of flesh from living animals and eat them. This hadith refutes their heinous act and clarifies that such cut-off flesh is considered carrion and impure; therefore, its consumption is forbidden.

Hadith Narrator:
SR Sayyiduna Abu Waqid al-Laythi radi Allahu anhu: ER Abu Waqid is his kunyah, his real name is Harith ibn ‘Awf. He is attributed to Banu ‘Amir ibn Layth, hence he is called al-Laythi. He was among the early Muslims. He is counted among the people of Madinah. According to one opinion, he participated in the Battle of Badr. He settled in the vicinity of Makkah. He passed away in 65 or 68 AH. His age was 75 or 85 years. He was buried in the Maqbarah Muhajirin at the place of Fakh.