2 Samuel 18:13
Otherwise I should have wrought falsehood against mine own life: for there is no matter hid from the king, and thou thyself wouldest have set thyself against me.
Cross-reference
2 Samuel 1:15
Historical context
2 Samuel 1:15 shows David executing the man who claimed to kill Saul — validating the messenger's fear of punishment for harming the king's son.
2 Samuel 1:16
Historical context
2 Samuel 1:16 records David's judgment that the man's own testimony condemned him — the same principle the messenger feared.
2 Samuel 4:10–12
Historical context
2 Samuel 4:10-12 shows David executing those who killed Ish-bosheth — further evidence that David punishes anyone harming his rivals.
2 Samuel 14:20
Parallel
In 2 Samuel 14:20, David is praised for knowing all things—echoing the same claim of the king's omniscience in 18:13.
Hebrews 4:13
Contrast
Hebrews 4:13 describes God's all-seeing nature—a divine counterpart to the human king's claimed omniscience in 18:13.