Solomon
Proverbs 16:10ESV·traditional attribution

An oracle is on the lips of a king; his mouth does not sin in judgment.

Matthew Henry Presbyterian @wholebiblehenry

We wish this were always true as a proposition, and we ought to make it our prayer for kings, and all in authority, that a divine sentence may be in their lips, both in giving orders, that they may do that in wisdom, and in giving sentence, that they may do that in equity, both which are included in judgment, and that in neither their mouth may transgress, Ti1 2:1.

John Gill Reformed Baptist @doctorgill

A divine sentence is in the lips of the king,.... Or "divination" (f), as the word signifies; or what is like to divination, as Aben Ezra and Gersom interpret it (g). What be says is as an oracle, and should be strictly true.

Jamieson-Fausset-Brown Reformed @jfbcommentary

The last clause depends on the first, expressing the importance of equity in decisions, so authoritative.