NET

18 But you have attacked my father’s family today. You murdered his seventy legitimate sons on one stone and made Abimelech, the son of his female slave, king over the leaders of Shechem, just because he is your close relative.

Darby

18 but ye are risen up against my father's house this day, and have slain his sons, seventy men, upon one stone, and have made Abimelech, the son of his handmaid, king over the citizens of Shechem, because he is your brother;

KJV

18 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;)