הלכה על ויקרא 26:1

That we not prostrate ourselves on a figured stone, even to God: That we not prostrate ourselves on a figured stone, even to God, blessed be He; as it is stated (Leviticus. 26:1), "and a figured stone you shall not place in your land, to prostate upon it." A figured stone refers to a stone that is adorned (see Sefer HaMitzvot LaRambam, Mitzvot Lo Taase 12). And so [too,] hewn stones that have been planed down with a scraper are also included in this prohibition of a figured stone.