Cross reference
Jeremiah 41:4
4 And it came to pass the second day after he had slain Gedaliah, and no man knew it,
1 Samuel 27:11
11 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.
Psalms 52:1-2
1 Why boastest thou thyself in mischief, O mighty man? the goodness of God endureth continually.
2 The tongue deviseth mischiefs; like a sharp razor, working deceitfully.