Kiddushin 58A

הראוים ליקרב, מנין לרבות בעלי מומין? מרבה אני בעלי מומין, שכן: מין המכשיר. ומנין לרבות את החיה? מרבה אני את החיה, שהיא בשחיטה כבהמה. מנין לרבות את העופות? תלמוד לומר: ״ושחטו״ ״ושחט אותו״ ״ושחט אותו״.

which are fit to be sacrificed. From where do I know to include blemished animals in this prohibition? I include blemished animals since they are at least of the type that is fit to be sacrificed. And from where do I know to include the undomesticated animal in this prohibition? I include the undomesticated animal since it is rendered fit for consumption by means of slaughtering, like a domesticated animal. From where do I know to include birds, as the Torah does not mention slaughter with regard to birds, in this prohibition? The verse states: “And he slaughters it,” “and he should slaughter it,” as well as “and he should slaughter it,” employing the additional term “it” each time. These 3 verses teach that one may not eat from a non-sacred animal that was slaughtered in the Temple courtyard

יכול לא ישחוט, ואם שחט ישליכנו לפני כלבים? תלמוד לומר: ״לכלב תשלכון אתו״⁠ – אותו אתה משליך לכלב, ואי אתה משליך חולין שנשחטו בעזרה.

The baraita continues: One might have thought that he may not slaughter a non-sacred animal in the Temple courtyard ab initio, but if he did slaughter it, he may cast it before the dogs, i.e., derive benefit from it. The verse states: “Therefore you should not eat any flesh that is torn of animals in the field; you should cast it to the dogs” (Exodus 22:30), which teaches that although one is prohibited from eating the meat of a tereifa, one may derive benefit from it. The word “it” serves to emphasize and exclude: You may cast it, i.e., a tereifa, to the dogs, but you may not cast non-sacred animals that have been slaughtered in the Temple courtyard, as it is prohibited to derive any benefit from them.