Judges 9:22-29 ESV
Abimelech ruled over Israel three years. And God sent an evil spirit between Abimelech and the leaders of Shechem, and the leaders of Shechem dealt treacherously with Abimelech, that the violence done to the seventy sons of Jerubbaal might come, and their blood be laid on Abimelech their brother, who killed them, and on the men of Shechem, who strengthened his hands to kill his brothers. And the leaders of Shechem put men in ambush against him on the mountaintops, and they robbed all who passed by them along that way. And it was told to Abimelech.
And Gaal the son of Ebed moved into Shechem with his relatives, and the leaders of Shechem put confidence in him. And they went out into the field and gathered the grapes from their vineyards and trod them and held a festival; and they went into the house of their god and ate and drank and reviled Abimelech. And Gaal the son of Ebed said, “Who is Abimelech, and who are we of Shechem, that we should serve him? Is he not the son of Jerubbaal, and is not Zebul his officer? Serve the men of Hamor the father of Shechem; but why should we serve him? Would that this people were under my hand! Then I would remove Abimelech. I would say to Abimelech, ‘Increase your army, and come out.’”
ESV: English Standard Version 2016