Commentary for Avodah Zarah 94:10
<big><strong>גמ׳</strong></big> אמר רב המשתחוה לבית אסרו אלמא קסבר תלוש ולבסוף חברו כתלוש דמי והאנן בנאו תנן
GEMARA. Rav said: If one worshipped a house, he has rendered it prohibited. Thus he holds that an object which is not attached to the ground and subsequently becomes attached is like a detached object. But the Mishnah deals with a shrine built [originally for idolatry]!
Daf Shevui to Avodah Zarah
The Talmud analyzes the underpinnings of Rav’s statement that if a person worships a house, he turns it into an idol that is now prohibited to Jews. A house consists of pieces that were once detached from the ground and now are attached. Things attached to the ground cannot become prohibited if they are worshipped. So it seems like Rav says although the house is currently attached, since its parts were once attached, it is still prohibited.
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