1 Samuel 27:11

And David did not leave alive a man or a woman to bring [them back] to Gath, thinking, "So that they will not report about us, saying, 'David did thus and so.'" Thus was his practice all the days that he lived in the countryside of [the] Philistines.

1 Samuel 22:22

Then David said to Abiathar, "I knew on that day that Doeg the Edomite was there, that he would certainly tell Saul. {I am responsible for the deaths of all your father's household}!

Proverbs 12:19

A lip of truth endures forever, but a tongue of deception lasts only a moment.

Proverbs 29:25

The fear of a person will lay a snare, but he who trusts in Yahweh will be secure.

Treasury of Scripture Knowledge

Summary

And David saved neither man nor woman alive, to bring tidings to Gath, saying, Lest they should tell on us, saying, So did David, and so will be his manner all the while he dwelleth in the country of the Philistines.

Bible References

Lest

1 Samuel 22:22
Then David said to Abiathar, "I knew on that day that Doeg the Edomite was there, that he would certainly tell Saul. {I am responsible for the deaths of all your father's household}!
Proverbs 12:19
A lip of truth endures forever, but a tongue of deception lasts only a moment.
Proverbs 29:25
The fear of a person will lay a snare, but he who trusts in Yahweh will be secure.