A prudent man is reluctant to display his knowledge, but the heart of [self-confident] fools proclaims their folly.
He who goes about as a talebearer reveals secrets, but he who is trustworthy and faithful in spirit keeps the matter hidden.
Curse not the king, no, not even in your thoughts, and curse not the rich in your bedchamber, for a bird of the air will carry the voice, and a winged creature will tell the matter.
And the men said to her, Our lives for yours! If you do not tell this business of ours, then when the Lord gives us the land we will deal kindly and faithfully with you.
And she lay at his feet until the morning, but arose before one could recognize another; for he said, Let it not be known that the woman came to the threshing floor.
1 Samuel 27:11
And David saved neither man nor woman alive to bring tidings to Gath, thinking, Lest they should say about us, So did David, and so will he do as long as he dwells in the Philistines' country.
2 Samuel 1:20
Tell it not in Gath, announce it not in the streets of Ashkelon, lest the daughters of the Philistines rejoice, lest the daughters of the uncircumcised exult.
In Gath [a city in Philistia] announce it not; in Acco weep not at all, [betraying your grief to foreigners; but among your own people] in Beth-le-aphrah [house of dust] roll yourself in the dust.
2 Kings 9:15
But King Joram had returned to be healed in Jezreel of the wounds which the Syrians had given him when he fought with Hazael king of Syria. And Jehu said, If this is your mind, let no one make his escape from the city [Ramoth-gilead] to go and tell it in Jezreel [the capital].
1 Samuel 21:2
David said to Ahimelech the priest, The king has charged me with a matter and has told me, Let no man know anything of the mission on which I send you and with what I have charged you. I have appointed the young men to a certain place.
Then Zedekiah said to Jeremiah, Let no man know of this conversation and you will not die.
So the commandant sent the youth away, charging him, Do not disclose to anyone that you have given me this information.
Argue your cause with your neighbor himself; discover not and disclose not another's secret,