Solomon
Proverbs 16:21WEB·traditional attribution
The wise in heart shall be called prudent. Pleasantness of the lips promotes instruction.
Matthew Henry Presbyterian
Note, 1. Those that have solid wisdom will have the credit of it; it will gain them reputation, and they shall be called prudent grave men, and a deference will be paid to their judgment. Do that which is wise and good and thou shalt have the praise of the same. 2.
Jamieson-Fausset-Brown Reformed
wise in heart--who rightly consider duty. sweetness of the lips--eloquent discourse, persuades and instructs others.
Geneva Bible Notes Reformed
The wise in heart shall be called prudent: and the sweetness of the lips increaseth learning. (k) The sweet words of consolation which come from a godly heart.