Proverbs 26:11
As, a dog, returneth onto his own vomit, a dullard, repeateth his folly.
2 Peter 2:22
There hath befallen them the thing spoken of in the true proverb - A dog, turning back unto his own vomit, and - A sow, as soon as washed, unto wallowing in mire.
Exodus 8:15
But when Pharaoh saw that there had come a respite, then made he his heart dull and hearkened not unto them, - as spake Yahweh.
Matthew 12:45
Then, it goeth, and taketh along with itself, seven diverse spirits, more wicked than itself, - and, entering, abideth there; and, the last state of that man, becometh, worse than the first. So, shall it be, with this, wicked, generation.