Proverbs 26:11

As a dog returneth to his vomit, to lick up that which he had lately vomited, forgetting how burdensome and vexatious it was to him, so a fool returneth to his folly; such like is the impudence and madness of sinners, who having smarted for their sins, and been forced to forsake them far a time, do afterwards return to the commission of them.