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halachic Judaism: Shabbat lamp
https://en.wikipedia.org/wiki/Shabbat_lamp
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halachic Judaism: shomer Shabbat
https://en.wikipedia.org/wiki/Shomer_Shabbat
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(hachic) Judaism: fish is parve (according to kashrut), but still: according to halakha fish and meat should not be eaten together
https://en.wikipedia.org/wiki/gefilte_fish
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halachic Judaism: Blech
https://en.wikipedia.org/wiki/Blech