1 Samuel 24:19
For if a man find his enemy, will he let him go well away? wherefore the Lord reward thee good for that thou hast done unto me this day.
Cross-reference
In 1 Samuel 26:25, Saul blesses David after being spared again — echoing the reward theme from the first sparing.
1 Samuel 25:33 has David blessing Abigail for preventing bloodshed — parallel to David blessing Saul for sparing him.
1 Samuel 26:8 shows Abishai urging David to kill Saul — contrasting David's mercy and reward prayer with vengeful advice.
Psalm 18:20 states God rewards David according to his righteousness — directly reflecting the reward David invokes for sparing Saul.
Proverbs 25:21 commands kindness to enemies — David's sparing of Saul is a direct example of this principle.
Proverbs 25:22 promises God's reward for kindness to enemies — exactly the reward David prays for Saul in 24:19.
Ruth 2:12 has Boaz blessing Ruth with 'The LORD repay you' — a near-identical blessing formula for good deeds.
In 2 Samuel 2:5, David blesses the men of Jabesh-gilead for showing kindness to Saul, mirroring Saul's blessing on David for sparing his enemy.