Negative commandment · Lo Ta’aseh #12 of 613
Not to make hewn stones [upon which to prostrate oneself]
שלא ליתן אבן משכית
The verse · Vayikra 26:1
לֹא־תַעֲשׂוּ לָכֶם אֱלִילִם וּפֶסֶל וּמַצֵּבָה לֹא־תָקִימוּ לָכֶם וְאֶבֶן מַשְׂכִּית לֹא תִתְּנוּ בְּאַרְצְכֶם לְהִשְׁתַּחֲוֺת עָלֶיהָ כִּי אֲנִי ה׳ אֱלֹהֵיכֶם
“You shall make no idols, nor shall you erect a carved idol, or a pillar, nor shall you install a figured stone in your land, to bow down upon it: for I am the Lord your God.”
The Rambam’s words
Not to make hewn stones [upon which to prostrate oneself], as [Leviticus 26:1] states: "You shall not place hewn stones..."
שלא ליתן אבן משכית, שנאמר "ואבן משכית לא תיתנו בארצכם" (ויקרא כו,א).
Why · Sefer HaChinuch #349
That we not prostrate ourselves on a figured stone, even to Hashem
“From the roots of the commandment is what Rambam, may his memory be blessed, wrote (Sefer HaMitzvot, Negative Commandments 12) that it is since they would do this for idolatry: They would place nicely figured stones before the idol and they would prostrate themselves upon [the stones] in front of it.”
Who & when
“And [it] is practiced in every place and at all times by males and females.”
Where in the Mishneh Torah
Hilchot Foreign Worship and Customs of the Nations הלכות עבודה זרה וחוקות הגויים