Solomon
Proverbs 17:7BSB·traditional attribution

Eloquent words are unfit for a fool; how much worse are lying lips to a ruler!

John Gill Reformed Baptist

Excellent speech becometh not a fool,.... A wicked man. Eloquence, or a sublime grand way of speaking, a copiousness and fluency of expression, become not such; because hereby he may be capable of doing more mischief; or such a style is unsuitable to the subject of his discourse, which is nothing but folly and wickedness.

Keil & Delitzsch Lutheran

Pro 17:7 7 It does not become a fool to speak loftily, How much less do lying lips a noble! As at Isa 32:5., נבל and נדיב are placed opposite to one another; the latter is the nobly magnanimous man, the former the man who thinks foolishly and acts profligately, whom it does not become to use lofty words, who thereby makes the impression of...

Matthew Henry Presbyterian

Two things are here represented as very absurd: 1. That men of no repute should be dictators. What can be more unbecoming than for fools, who are known to have little sense and discretion, to pretend to that which is above them and which they were never cut out for?