As a dog that returneth to his vomit, So is a fool that repeateth his folly.

Like a dog going back to the food which he has not been able to keep down, is the foolish man doing his foolish acts over again.

Ως ο κυων επιστρεφει εις τον εμετον αυτου, ουτως ο αφρων επαναλαμβανει την αφροσυνην αυτου.

As a dog returneth to his vomit, so a fool returneth to his folly.