Judges 9:5; Judges 9:18

5 He went to his father’s home in Ophrah and on one stone murdered his seventy brothers, the sons of Jerub-Baal. But Jotham, the youngest son of Jerub-Baal, escaped by hiding.

18 But today you have revolted against my father’s family. You have murdered his seventy sons on a single stone and have made Abimelek, the son of his female slave, king over the citizens of Shechem because he is related to you.