But these you shall not eat of those that chew the cud or of those that have the split hoof, the cloven one: the camel, the hare, and the hyrax, for they chew the cud but do not have split hooves; they are unclean for you.
English: “The camel, the hare and the hyrax” — I have only these alone. Whence do I include the other unclean animals? A fortiori: if these, which possess signs of purity, are forbidden by a negative commandment, then the other unclean animals that possess no signs of purity — how much more so!
On the daf / in context: The three named animals that have a partial sign receive an explicit lav; from them Sifrei derives the prohibition of all fully unclean animals by kal va-chomer.
Type of Learning
Kal va-chomer (Sifrei) — from the partial-sign animals to those with no signs at all.
What Is Learned
All unclean land animals are forbidden by a negative commandment; the named partial-sign cases supply the explicit lav from which the rest follow a fortiori.