דברים יד:ח מדרש: ספרא

7) If so, I would say: Who forbids the camel? (The fact that it does not have) cloven hooves. Let that permit the swine. It must, therefore, be written (Devarim 14:8) "And the swine, because its hooves are parted, but it does not chew the cud, it is unclean."