Performing a service for a minor: Nedarim 36a
Practice of turining to the right atop the Altar: Yoma 58b
List of the hardest Services: Yoma 47b
The Service [of the Pesach Offering] was arranged for beauty: Pesachim 64b
Priority of mitzvah of Reading the Purim Story, vs. Service in the Temple: Megillah 3a-b
Priority of mitzvah of Burying a body which has no buriers, vs. Service in the Temple: Megillah 3a-b
Interrupting the study of Torah for Service in the Temple: Megillah 3a-b
The Value of Torah Learning, as opposed to that of Temple Service: Megillah 3a-b