'Uncut' in the Bible

You shall build the altar of Yahweh your God of uncut stones; and you shall offer burnt offerings thereon to Yahweh your God:

as Moses the servant of Yahweh commanded the children of Israel, as it is written in the book of the law of Moses, an altar of uncut stones, on which no man had lifted up any iron. They offered burnt offerings on it to Yahweh, and sacrificed peace offerings.