David is giving his final instructions to Solomon, and he brings up Joab's past actions. This wasn't just about revenge; it was about bringing order and accountability.
The King's Duty to Justice
David reminds Solomon of Joab's actions: killing Abner and Amasa. These weren't acts of war against enemies, but executions carried out in a time of peace.
- Abner's Death: Joab killed Abner as revenge for his brother Asahel's death, even though Abner had sought refuge and reconciliation with David.
- Amasa's Death: Joab killed Amasa deceitfully, spilling his blood and then leaving it on his own clothes, effectively an act of public defiance and brutality.
David frames these as serious offenses that he, as king, could not fully address at the time. Now, he passes this responsibility to Solomon, highlighting the king's role in upholding justice and ensuring that such lawless violence doesn't go unpunished, even by his own military leaders.