Proverbs 10:19
17 The one who heeds instruction is on the way to life, but the one who rejects rebuke goes astray. 18 The one who conceals hatred utters lies, and the one who spreads slander is certainly a fool. 19 When words abound, transgression is inevitable, but the one who restrains his words is wise. 20 What the righteous say is like the best silver, but what the wicked think is of little value. 21 The teaching of the righteous feeds many, but fools die for lack of sense.
Sirach 20:8
Ben Sira, Ecclesiasticus6 Some people keep silent because they have nothing to say, while others keep silent because they know when to speak. 7 The wise remain silent until the right moment, but a boasting fool misses the right moment. 8 Whoever talks too much is detested, and whoever pretends to authority is hated. 9 There may be good fortune for a person in adversity, and a windfall may result in a loss. 10 There is the gift that profits you nothing, and the gift to be paid back double.
Notes and References
"... As a contrast with the rich person whose words are “loathsome,” Ben Sira takes the case of a pauper who “will speak giving insight”. The word is the hiphil masculine participle from the root (“have insight,” “be prosperous”); the cognate noun (“insight”) occurs in 13:23. The exact syntactic function in 13:22 is uncertain. It could refer to what is spoken, since the form occurs thirteen times in the Masoretic text as a title for various psalms, possibly in the sense of “didactic poem” or “skillful composition.” However, the uncertainty over the meaning as a psalm title makes this suggestion suspect, and so it seems better to understand the word as describing the action of a person “giving insight.” In the book of Proverbs the participle refers to “one giving insight” or “an insightful person”; for example, Proverbs 10:19 teaches: “One who restrains his words is an insightful person” (compare Prov 15:24) ..."
Corley, Jeremy Ben Sira's Teaching on Friendship (p. 149) Brown University, 2020