Matthew Poole and continuators on Proverbs 15:23

23 A man hath joy by the answer of his mouth, and a word spoken in due season , how good is it !

i. e. By a wise, or good and seasonable Answer or Advice, as is manifest both from the opposite clause, and from the nature of the thing, because it is manifest and undeniable, that a foolish Answer can be no credit nor comfort to the Answerer. Thus above v. 10. the way is put for Gods way; and such Synecdoche's are frequent in Scripture.

Counsel or comfort given to another in fit time and manner.

It is highly acceptable and useful.

Marginal references: Heb. in his season.