In 2 Samuel 4, the story continues after the death of King Saul and his sons. Two of Saul's captains, Baanah and Rechab, decide to take matters into their own hands and assassinate Ishbosheth, one of Saul's surviving sons who was ruling over Israel. They sneak into Ishbosheth's house while he is resting and strike him down, beheading him and taking his head as proof of their deed. They then travel all night to present the head to David, thinking they would be rewarded for their act.
However, David is appalled by their action and their attempt to gain favor by killing an innocent man in his own house. He orders his men to execute Baanah and Rechab as punishment for their treacherous act. The bodies of these assassins are then hung up and displayed in Hebron as a warning.
This chapter showcases David's commitment to justice and his refusal to accept bloodshed as a means to gain power. Despite being in conflict with the house of Saul, David does not condone the murder of an anointed king. Instead, he upholds the principles of righteousness and accountability.