Judges 9:5-6

Thomson(i) 5 and he went to his father's house at Ephratha, and slew his brothers, the sons of Jerobaal, seventy men, on one stone. Jotham indeed, the youngest son of Jerobaal was left, for he bad hid himself. 6 Then all the Sychemites, and all the house of Bethmaalo, assembled and went and proclaimed Abimelech king, near the oak grove, which was invented for the assembling at Sychem.