[If] gentiles worship mountains and hills —-they are permitted, but what is upon them is prohibited; as it says: You shall not covet the silver and gold that is upon them and take [it]. R’ Yose HaGlili says: Their gods upon the mountains, but not that the mountains are their gods; their gods upon the hills, but not that the hills are their gods. Then why is an asherah prohibited? Because it has been affected by human involvement, and anything which has been affected by human involvement becomes prohibited. Said R’ Akiva: I will expound and deliberate before you. Every place that you find a high mountain or a raised hill or a green tree, know that an idolatrous object is there.