Proverbs 12:23

12:23 The shrewd person conceals knowledge,

but foolish people publicize folly.

Proverbs 16:21

16:21 The one who is wise in heart is called discerning,

and kind speech increases persuasiveness.

18:6 The lips of a fool enter into strife,

and his mouth invites a flogging.

20:6 Many people profess their loyalty,

but a faithful person – who can find?

21:13 The one who shuts his ears to the cry of the poor,

he too will cry out and will not be answered.