Solomon
Proverbs 20:18ESV·traditional attribution

Plans are established by counsel; by wise guidance wage war.

Matthew Henry Presbyterian @wholebiblehenry

Note, 1. It is good in every thing to act with deliberation, and to consult with ourselves at least, and, in matters of moment, with our friends, too, before we determine, but especially to ask counsel of God, and beg direction from him, and observe the guidance of this eye.

John Gill Reformed Baptist @doctorgill

Every purpose is established by counsel,.... Or "the thought" (f) of a man, everyone of them, what he has thought to do, formed a scheme of in his mind, and resolved upon, by taking advice of his friends, and especially by asking counsel of God, who gives, wisdom liberally, and upbraids not; he is confirmed in his good designs; and he cheerfully pursues them, and...

Jamieson-Fausset-Brown Reformed @jfbcommentary

(Compare Pro 15:22). Be careful and considerate in important plans.