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