Proverbs 26:11

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.

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.

As a dog returns to its vomit, so a fool repeats his folly.

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

Stupid people repeat their stupidity like a dog returning to its vomit.

As a dog turneth againe to his owne vomit, so a foole turneth to his foolishnes.

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