1 Samuel 18:12 first states Saul's fear of David; here that fear intensifies as Saul becomes a continual enemy.

1 Samuel 18:15 notes Saul's fear at David's wisdom; this verse shows that fear growing into permanent enmity.

In Genesis 4:4-8, Cain's jealousy leads to murder, mirroring Saul's growing enmity toward David.

In John 11:53, the Jewish leaders plot to kill Jesus, just as Saul became David's enemy continually.

In 1 John 3:12-15, Cain's murder is cited as the pattern of hatred; Saul's enmity toward David exemplifies this same hatred.

In Psalm 13:2, David laments his enemy's triumph; Saul's continual enmity is the very situation David prays about.

Psalm 37:12-14 describes the wicked plotting against the righteous — mirroring Saul's enmity toward David here.

Ecclesiastes 4:4 observes that envy drives rivalry — Saul's envy of David fuels his enmity in this verse.