Judges 9:23-24

23And 1God sent an evil spirit between Abimelech and the citizens of Shechem; and the citizens of Shechem dealt treacherously with Abimelech,

24that the violence [done] to the seventy sons of Jerubbaal might come, and their blood be laid upon Abimelech their brother, who slew them, and upon the citizens of Shechem, who had strengthened his hands to slay his brethren.