Berean Standard Bible
Proverbs 16:23
“The heart of the wise man instructs his mouth and adds persuasiveness to his lips.”

In context
21The wise in heart are called discerning, and pleasant speech promotes instruction.
22Understanding is a fountain of life to its possessor, but the discipline of fools is folly.
23The heart of the wise man instructs his mouth and adds persuasiveness to his lips.
24Pleasant words are a honeycomb, sweet to the soul and healing to the bones.
25There is a way that seems right to a man, but its end is the way of death.
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Berean Standard Bible · A modern, readable English translation. Public domain (CC0).