A sin offering which is blemished, and is slaughtered before its replacement offering is brought: Temurah 22b, 24a
A sin offering which is blemished, and is slaughtered after its replacement offering is brought: Temurah 22b, 24a
If a sin offering becomes blemished and another is dedicated as the new offering, in what order do we redeem the former and offer the latter: Temurah 24a