Solomon
Ecclesiastes 7:27ESV·traditional attribution

Behold, this is what I found, says the Preacher, while adding one thing to another to find the scheme of things—

Matthew Henry Presbyterian @wholebiblehenry

Solomon had hitherto been proving the vanity of the world and its utter insufficiency to make men happy; now here he comes to show the vileness of sin, and its certain tendency to make men miserable; and this, as the former, he proves from his own experience, and it was a dear-bought experience.

Commenting on Ecclesiastes 7:23-29

John Gill Reformed Baptist @doctorgill

Behold, this have I found,.... That a harlot is more bitter than death; and which he found by his own experience, and therefore would have it observed by others for their caution: or one man among a thousand, Ecc 7:28; (saith the preacher); of which title and character see Ecc 1:1; it is here mentioned to confirm the truth of what he said; he said...

Jamieson-Fausset-Brown Reformed @jfbcommentary

this--namely, what follows in Ecc 7:28. counting one by one--by comparing one thing with another [HOLDEN and MAURER]. account--a right estimate. But Ecc 7:28 more favors GESENIUS. "Considering women one by one."