2 Samuel 13:3
But Amnon had a friend, whose name was Jonadab, the son of Shimeah David’s brother: and Jonadab was a very subtil man. But Amnon had a friend, whose name was Jonadab, the son of Shimeah David’s brother: and Jonadab was a very subtil man.
This text stands within the account of Amnon's great crime against Tamar. That crime was followed by Absalom's revenge, in which Absalom killed Amnon. The surrounding events show David's sons repeating their father's sins. In doing so they brought the consequences of those sins into his own life.