2 Peter 2:22
But it has happened to them according to the true proverb, The dog returned to his vomit, and the swine that was washed to wallowing in filth.
Matthew 12:45
Then it goes and takes with itself seven other spirits worse than itself, and they enter in and dwell there; and the last state of that man is worse than the first. So shall it be also with this evil generation.
Treasury of Scripture Knowledge
Summary
As a dog returneth to his vomit, so a fool returneth to his folly.
A dog
Bible References
A dog
Matthew 12:45
Then it goes and takes with itself seven other spirits worse than itself, and they enter in and dwell there; and the last state of that man is worse than the first. So shall it be also with this evil generation.
2 Peter 2:22
But it has happened to them according to the true proverb, The dog returned to his vomit, and the swine that was washed to wallowing in filth.