Related do Szabbat 19:8

Rabbi Yose said: And if circumcision, which it's certainty displaces the Sabbath, in case of doubt does not displace the holiday, the covering of blood, which its certainty doesn't displace the Sabbath, it is only logical that its doubt shall displace the holiday!

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.