Solomon
Proverbs 18:13ESV·traditional attribution

If one gives an answer before he hears, it is his folly and shame.

Matthew Henry Presbyterian @wholebiblehenry

See here how men often expose themselves by that very thing by which they hope to gain applause. 1. Some take a pride in being quick. They answer a matter before they hear it, hear it out, nay, as soon as they but hear of it.

John Gill Reformed Baptist @doctorgill

He that answereth a matter before he heareth it,.... Who is impatient, and cannot wait to hear it out, but breaks in upon the speaker before he has finished what he has to say; or is rash and precipitate, and returns an answer at once, without weighing and considering, and thoroughly understanding, what is said: it is folly and shame unto him; his answer must...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Hasty speech evinces self-conceit, and ensures shame (Pro 26:12).