Deuteronomy 14:8
and the swine, because it divides the hoof, yet does not chew the cud, it is unclean unto you. Ye shall not eat of their flesh nor touch their dead carcase.
Leviticus 11:26-27
The carcasses of every animal which divides the hoof and is not clovenfooted, nor chews the cud, are unclean unto you; everyone that touches them shall be unclean.
Isaiah 65:4
who remain asleep among the graves, and lodge in the deserts, who eat swine's flesh, and broth of abominable things is in their vessels;
Isaiah 66:3
He that kills an ox is as if he slew a man; he that sacrifices a lamb as if he cut off a dog's neck; he that offers an oblation as if he offered swine's blood; he that burns incense as if he blessed iniquity. They have chosen their own ways, and their soul delights in their abominations.
Isaiah 66:17
Those that sanctify themselves and purify themselves in the gardens, one behind another; those that eat swine's flesh and abomination, and the mouse shall be cut off together, saith the LORD.
Luke 15:15-16
And he went and joined himself to a citizen of that country; and he sent him into his fields to feed swine.
2 Peter 2:22
But it has happened unto them according to the true proverb, The dog returns unto his own vomit, and the sow that was washed to her wallowing in the mire.