Matthew 7:6
Give not that which is holy to dogs, neither cast your pearls before swine, lest they trample them under their feet, and turning, rend you.
Luke 8:33
And he suffered them. Then went the devils out of the man, and entered into the swine; and the herd rushed down a steep place into the lake and were choked.
Luke 15:15
And he went and joined himself to a citizen of that country; and he sent him into his fields, to feed swine.
2 Peter 2:18-22
For by speaking swelling words of vanity, they allure thro' the desire of the flesh, thro' wantonness, those that were clean escaped from them that live in error.