Yoma 63a and Yoma 63b, how to change a Pesah into another kind of sacrifice (and risk being liable for shehutei hutz, slaughtering a sacrifice outside the Temple grounds), and how we know that various laws–shehutei hutz, needing to be eight days old before it is offered and/or named, may not have a physical blemish–apply also to the se’ir ha-mishtaleach, the goat sent out to the desert.
