Solomon
Proverbs 16:13ESV·traditional attribution

Righteous lips are the delight of a king, and he loves him who speaks what is right.

Matthew Henry Presbyterian @wholebiblehenry

Here is a further character of good kings, that they love and delight in those that speak right. 1. They hate parasites and those that flatter them, and are very willing that all about them should deal faithfully with them and tell them that which is true, whether it be pleasing or displeasing, both concerning persons and things, that every thing should be set in...

John Gill Reformed Baptist @doctorgill

Righteous lips are the delight of kings,.... Such that speak truth and righteousness, and advise to the administration of justice and judgment, and to do that which is most for their own true honour and the people's good, are, or ought to be, highly valued and esteemed by kings: but the contrary is too often the case; kings hearken to those that speak lies, that...

Jamieson-Fausset-Brown Reformed @jfbcommentary

A specification of the general sentiment of Pro 16:12.