Shemini, Chapter 4
1) Whence is it derived that five (animals in the class of) sin-offerings must (be allowed to) die (and not be eaten)? From (the redundant) "of those that chew the cud … it is unclean to you." (i.e., even though they have both cleanliness signs they are unclean) (the five sin-offerings: the offspring of a sin-offering, the substitute for a sin-offering, a sin-offering whose owner had died, a sin-offering which had been lost and which was found after atonement had been made with another animal, and a sin-offering whose year (of acceptability) had expired) Whence is derived for inclusion (as being allowed to die), (a substitute for) invalidated sanctified animals (i.e., sanctified animals which had sustained a blemish and been redeemed)? From "and of those whose hooves are parted … it is unclean to you." Whence is derived for inclusion the milk of the five sin-offerings which must die? From "of those that chew the cud … it is unclean." Whence is derived for inclusion the milk of invalidated sanctified animals? From (Devarim 14:7): "of those whose hooves are parted, the shesua … they are unclean to you." Whence is derived for inclusion the milk of an unclean animal? It follows, viz.: An unclean animal is forbidden, and grapes are forbidden to a Nazirite — Just as with grapes to a Nazirite, what is extracted from them is (forbidden) like them; so, with a beast, what is extracted from it (milk) is (forbidden) like it.