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)." (ES)
English reference (ES): Vol. 4, Book 28, Hadith 3216 (ES)
Arabic reference (ES): Book 28, Hadith 3337 (ES)