wster kuwn otan epelqh epi ton eautou emeton kai mishtoV genhtai, outwV afrwn th eautou kakia anastereyaV epi thn eautou amartian

kuwn epistreyaV epi to idion exerama, kai:  uV lousamenh eiV kulismon borborou
 

As when a dog goes to his own vomit, and becomes abominable, so is a fool who returns in his wickedness to his own sin

The dog turning to his own vomit again, and the sow that had washed to wallowing in the mire
 

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