Read Judges 9:18 Using Other Translations
And ye are risen up against my father's house this day, and have slain his sons, threescore and ten persons, upon one stone, and have made Abimelech, the son of his maidservant, king over the men of Shechem, because he is your brother;)
and you have risen up against my father's house this day and have killed his sons, seventy men on one stone, and have made Abimelech, the son of his female servant, king over the leaders of Shechem, because he is your relative--
But today you have revolted against my father and his descendants, killing his seventy sons on one stone. And you have chosen his slave woman’s son, Abimelech, to be your king just because he is your relative.