Judges 9:21-25

Then Jotham escaped and fled, and went to Beer; and he stayed there because of his brother Abimelech. Shechem and Abimelech Fall

Now Abimelech ruled over Israel for three years.

Then God sent an evil spirit between Abimelech and the leaders of Shechem; and the leaders of Shechem dealt treacherously with Abimelech,

so that the violence done to the seventy sons of Jerubbaal would come, and the responsibility for their blood would be placed on their brother Abimelech, who killed them, and on the leaders of Shechem, who encouraged him to kill his brothers.

The leaders of Shechem set up men in ambush against him on the tops of the mountains, and they robbed everyone who would pass by them on the road; and it was reported to Abimelech.