Related for Bekhorot 65:17
בכור אין מאכילין אותו לנדות דברי בית שמאי
and the last [to interpret as follows]: As a gazelle and hart ar not subject to the law of the firstling and the priest's gift, so consecrated objects rendered unfit for sacrifi are not subject to the law of the firstling and the priest's gifts.
Tosefta Beitzah (Lieberman)
One must not flay the legs of a slaughtered animal on the holiday. And one must not flay the legs of a slaughtered animal on the working day, if it is a firstborn or a sacred animal that has become unfit acts. You can do anything for circumcision on a holiday necessary to do; Things that one is not allowed to do on the Sabbath, one may also do on the holiday: He may grate cumin and mix wine with oil. Rabban Shimon ben Gamliel says: Only he shall not first tear canvas to rags.
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