This verse drops a shocking historical detail about a brutal death. It’s a vivid reminder that actions, even those seemingly small or far away, can have deadly consequences.
The question, 'Who killed Abimelech the son of Jerubbesheth? Did not a woman cast an upper millstone on him from the wall, so that he died at Thebez?' is a rhetorical jab. It highlights a past, ignominious death to shame Joab and, by extension, David. The 'upper millstone' was a heavy, deadly weapon, and its being dropped by a woman underscores the vulnerability and the unexpected ways people can meet their end. This event, recorded in Judges 9, serves as a stark historical parallel, reminding David of the consequences of recklessness and divine judgment.