It wasnarrated from Ibn 'Umar that the Prophet (ﷺ) said:
"Whateveriscut from an animal hen it is still alive, what is cut from it isMaitah (dead meat)." (IT)
English reference (IT): Vol. 4, Book 28, Hadith 3216 (IT)
Arabic reference (IT): Book 28, Hadith 3337 (IT)