He went to his father’s house in Ophrah, and on one stone murdered his seventy brothers, the sons of Jerubbaal. But Jotham, the youngest son of Jerubbaal, survived, because he hid himself.
Jewish Publication Society of America Version (JPS1917) - Judges 9:5 >And he went unto his father's house at Ophrah, and slew his brethren the sons of Jerubbaal, being threescore and ten persons, upon one stone; but Jotham the youngest son of Jerubbaal was left; for he hid himself.