Judges 9:23-24

God sent a spirit of ill will between Abimelech and the men of Shechem; and the men of Shechem dealt treacherously with Abimelech, that the crime done to the seventy sons of Jerubbaal might be settled and their blood be laid on Abimelech their brother, who killed them, and on the men of Shechem, who aided him in the killing of his brothers.