Matthew 7:6
"Give not that which is holy to the dogs; neither cast your pearls before the swine, lest haply they trample them down with their feet; and, turning, rend you.
Luke 8:33
And the demons, going out from the man, entered into the swine, and the herd rushed down the steep into the lake, and were drowned.
Luke 15:15
And, going his way, he attached himself to one of the citizens of that country; and he sent him into his fields to feed swine.
2 Peter 2:18-22
For, uttering great swelling words of vanity, they entice, in desires of the flesh, by their lasciviousness, those just escaping from those who live in error;