'Unhewn' in the Bible

You must build the altar of your God [with] unhewn stones, and you shall sacrifice on it burnt offerings to Yahweh your God.

as Moses Yahweh's servant commanded the {Israelites}, as [it is] written in the scroll of the law of Moses: "an altar of unhewn stones [on] which no one has {wielded} an iron implement." And they offered burnt offerings on it and sacrificed fellowship offerings.