Proverbios 26

Like a dog that returns to his vomit, so also is the imprudent who repeats his foolishness.

Como perro que vuelve á su vómito, así el necio que repite su necedad.

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

As a dog that returns to his vomit, so is a fool who repeats his folly.