Judges 9:23-24

And God sent an evil spirit between Abimelech and the townsmen of Shechem; and the townsmen of Shechem were false to Abimelech; So that punishment for the violent attack made on the seventy sons of Jerubbaal, and for their blood, might come on Abimelech, their brother, who put them to death, and on the townsmen of Shechem who gave him their help in putting his brothers to death.