1 Samuel 24:18
And thou hast shewed this day how that thou hast dealt well with me: forasmuch as when the Lord had delivered me into thine hand, thou killedst me not.
Cross-reference
1 Samuel 24:10 records David's own account of sparing Saul — the very declaration Saul references in verse 18.
In 1 Samuel 24:4, David's men remind him of the prophecy that God would give his enemy into his hand — the very moment David spares Saul.
1 Samuel 23:7 shows Saul mistakenly thinking God gave David into his hand — contrasting with 24:18 where God gave Saul into David's hand.
In 1 Samuel 26:8, Abishai again urges David to kill Saul when God delivers him — mirroring the same test of mercy from chapter 24.
1 Samuel 26:23 repeats David's principle of not harming the LORD's anointed — reinforcing the same righteous act described in 24:18.
Job 16:11 laments being handed over to the wicked — contrasting with David's mercy when handed over to Saul.