Proverbs 29:19

A servant will not be corrected by words: for though he understand he will not answer.
– Proverbs 29:19

Verses 19-21 loosely form a group of sayings centered on the servant. The word means bondmen, or slave. The implications seem to have more to do with a servant mindset than a status. For instance, it is possible to be a wise servant (Proverbs 17:2). This saying has the foolish servant in mind, as he stubbornly refuses correction, which is characteristic of a fool (Proverbs 29:1, 9). It could be there is a subtly play on words here as the servant mindset is enslaved to folly.