Deuteronomy 14:8
The pig, because it has a split hoof but doesn't chew the cud, is unclean to you: of their flesh you shall not eat, and their carcasses you shall not touch.
Leviticus 11:26-27
"'Every animal which parts the hoof, and is not cloven-footed, nor chews the cud, is unclean to you. Everyone who touches them shall be unclean.
Isaiah 65:4
who sit among the graves, and lodge in the secret places; who eat pig's flesh, and broth of abominable things is in their vessels;
Isaiah 66:3
He who kills an ox is as he who kills a man; he who sacrifices a lamb, as he who breaks a dog's neck; he who offers an offering, [as he who offers] pig's blood; he who burns frankincense, as he who blesses an idol. Yes, they have chosen their own ways, and their soul delights in their abominations:
Isaiah 66:17
"Those who sanctify themselves and purify themselves [to go] to the gardens, behind one in the midst, eating pig's flesh, and the abomination, and the mouse, they shall come to an end together," says Yahweh.
Luke 15:15-16
He went and joined himself to one of the citizens of that country, and he sent him into his fields to feed pigs.
2 Peter 2:22
But it has happened to them according to the true proverb, "The dog turns to his own vomit again," and "the sow that has washed to wallowing in the mire."