Circumcision after the 8th day, on Holidays: Shabbat 132b-133a
Grinding spices for a plaster to put on the Circumcision: Shabbat 134a
Beating oil and wine for a plaster to put on the Circumcision: Shabbat 134a
Sweetening a plaster by dunking a metal "coal," as opposed to a wood coal, into it: Shabbat 134a