Judges 9:22-26

When Abimelech had reigned three years over Israel,

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

That the cruelty done to the threescore and ten sons of Jerubbaal might come, and their blood be laid upon Abimelech their brother, which slew them; and upon the men of Shechem, which aided him in the killing of his brethren.

And the men of Shechem set liers in wait for him in the top of the mountains, and they robbed all that came along that way by them: and it was told Abimelech.

And Gaal the son of Ebed came with his brethren, and went over to Shechem: and the men of Shechem put their confidence in him.