Menahot 46: The Loaves and Lambs of Shavuot

The bond between the animal sacrifices of the holiday of Shavuot and the "Shtei ha-Lechem" loaves of the same holiday, and when they are both required, as essential, and when one could be offered without the other, if need be. Also, a deeper dive into the the loaves of the Shtei ha-Lechem to begin with, and how they have to be changed in appearance (and if and when they are to be eaten). The rabbinic approach to the lambs seems to contradict the Torah's requirement - which needs its own deeper dive, as well.