What are some proverbs that caution against engaging in arguments with fools?

One proverb that cautions against arguing with fools is "Never argue with a fool, onlookers may not be able to tell the difference." Another one is "Arguing with a fool proves there are two." These proverbs suggest that it is unwise to engage in arguments with foolish or irrational people as it is often futile and can be detrimental.