Solomon
Proverbs 12:19ESV·traditional attribution

Truthful lips endure forever, but a lying tongue is but for a moment.

Matthew Henry Presbyterian @wholebiblehenry

Be it observed, to the honour of truth, that sacred thing, 1. That, if truth be spoken, it will hold good, and, whoever may be disobliged by it and angry at it, yet it will keep its ground. Great is the truth and will prevail. What is true will be always true; we may abide by it, and need not fear being disproved and put to shame. 2.

John Gill Reformed Baptist @doctorgill

The lip of truth shall be established for ever,.... The man that speaks truth is and will be established in his credit and reputation among men; he is uniform and all of a piece, and what he says is believed; truth, though it may be opposed, will prevail against lies and falsehood; the word of truth, the Gospel of Christ, will stand for ever; the...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Words of truth are consistent, and stand all tests, while lies are soon discovered and exposed.