2 Samuel 13:21
But when king David heard of all these things, he was very wroth.
Cross-reference
2 Samuel 12:10 prophesies the sword never leaving David's house—this verse marks the beginning of that fulfillment through Amnon's sin.
2 Samuel 3:28 has David declaring innocence over Abner's murder—contrasting with his passive anger in response to Amnon's crime here.
2 Samuel 12:5 records David's anger leading to a death sentence—contrasting with his inaction after Amnon's sin here.
2 Samuel 3:29 shows David cursing Joab's house—contrasting with his failure to act against Amnon despite being angry.
In Genesis 34:7, Jacob's sons react with grief and fury to Shechem's rape of Dinah — the same outrage David feels here over Amnon's rape of Tamar, but David takes no action.
In 1 Samuel 2:22-25, Eli rebukes his sons for sexual sin at the tabernacle but fails to restrain them — a parallel to David's failure to act here.
In Psalm 101:8, David declares he will cut off evildoers from the city — a stark contrast to his failure here to punish his own son Amnon for rape.
In 1 Samuel 2:29, God rebukes Eli for honoring his sons above God — a parallel to David's failure to discipline Amnon, showing misplaced priorities.