Yoreh Deah Siman 26 Seif 2

 

ב שָׁחַט הַקָּנֶה וְנִקְּבָה הָרֵאָה קֹדֶם שֶׁשָּׁחַט הַוֵּשֶׁט, אוֹ שֶׁשָּׁחַט הַוֵּשֶׁט וְנִקְּבוּ בְּנֵי מֵעַיִם קֹדֶם שֶׁשָּׁחַט הַקָּנֶה,טְרֵפָה.

 

Seif 2

While one is slaughtering the gullet/esophagus and one finds that the lungs are punctured before he was able to slaughter the gullet, or if while one is slaughtering the gullet/esophagus and one finds that intestines are punctured before he was able to slaughter the gullet, it is considered Torn (It’s unacceptable).