Solomon
Proverbs 27:21ESV·traditional attribution

The crucible is for silver, and the furnace is for gold, and a man is tested by his praise.

Matthew Henry Presbyterian @wholebiblehenry

This gives us a touchstone by which we may try ourselves. Silver and gold are tried by putting them into the furnace and fining-pot; so is man tried by praising him. Let him be extolled and preferred, and then he will show himself what he is. 1.

John Gill Reformed Baptist @doctorgill

Be thou diligent to know the state of flocks,.... In what condition they are; what health they enjoy; how fat and fruitful they be; what pasturage they have; and that they want nothing fitting for them that can be had and is necessary; and also the number of them.

Jamieson-Fausset-Brown Reformed @jfbcommentary

Praise tests character. a man to his praise--according to his praise, as he bears it. Thus vain men seek it, weak men are inflated by it, wise men disregard it, &c.