Judges 9:54

54. A woman slew him This was reckoned a terrible disgrace to a warrior. Like his next successor in Israelitish royalty, (1 Samuel 31:4,) he implored his armour-bearer to despatch him; but he did not thereby escape the dreaded ignominy, for the manner of his death was written in history, and long after familiarly associated with his memory. 2 Samuel 11:21. And thus was ultimately fulfilled the prophetic curse of Jotham.

“Much more beautiful is the otherwise tragical death of Saul. His attendant, influenced by reverence, refuses to kill him, and finally follows him in voluntary death. The songs of David celebrate Saul’s memory; but Abimelech’s epitaph is his brother Jotham’s curse.” Cassel.