'Stone' in the Bible

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.

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 maid-servant, king over the men of Shechem, because he is your brother);