Berean Standard Bible
Proverbs 17:27
“A man of knowledge restrains his words, and a man of understanding maintains a calm spirit.”

In context
25A foolish son brings grief to his father and bitterness to her who bore him.
26It is surely not good to punish the innocent or to flog a noble for his honesty.
27A man of knowledge restrains his words, and a man of understanding maintains a calm spirit.
28Even a fool is considered wise if he keeps silent, and discerning when he holds his tongue.
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Berean Standard Bible · A modern, readable English translation. Public domain (CC0).