In 1 Samuel 28:20, Saul's fear intensifies after Samuel's words—he falls full length, showing the immediate consequence of his terror.

Proverbs 10:24 states what the wicked fears comes upon him—Saul feared the Philistines and soon died.

Isaiah 7:2 says Ahaz's heart shook like trees in the wind—same metaphor of a king's fear at an enemy threat.