Charles Ellicott Commentary Proverbs 14:7

"Go into the presence of a foolish man, And thou shalt not perceive [in him] the lips of knowledge." — Proverbs 14:7 (ASV)

Go from the presence of a foolish man— (khesîl)— i.e. a dull, stupid one, when the time comes that you see you can do him no good; for evil communications corrupt good manners. Thus Samuel came no more to see Saul, when he saw that remonstrances were unavailing with him, though he continued to mourn for him, remembering from what high estate he had fallen.