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