Luke 15:15-16

So he went and engaged himself to one of the people of that country, who sent him into his fields to tend pigs.

2 Peter 2:22

In their case is seen the truth of the proverb-- 'A dog returns to what he has vomited' and 'A sow after washing to her wallowing-place in the mud.'

Treasury of Scripture Knowledge

Summary

And the swine, because it divideth the hoof, yet cheweth not the cud, it is unclean unto you: ye shall not eat of their flesh, nor touch their dead carcase.

Bible References

The swine

Luke 15:15
So he went and engaged himself to one of the people of that country, who sent him into his fields to tend pigs.
2 Peter 2:22
In their case is seen the truth of the proverb-- 'A dog returns to what he has vomited' and 'A sow after washing to her wallowing-place in the mud.'