The Mishna, Shabas chapter 19, describes beating wine with oil (to make a healing ointment for a circumcision) as something that can be done a day in advance and therefore may not be done on Shabas. But if they're beaten together a day in advance, they'll separate!

  • 2
    Maybe they would add an emulsifier?
    – Joel K
    Sep 19, 2022 at 5:38
  • Have you tried this yourself?
    – N.T.
    Sep 19, 2022 at 6:46
  • @N.T. yes, with vinegar and oil. I assume the same would apply to wine.
    – msh210
    Sep 19, 2022 at 10:50
  • @JoelK maybe. Or maybe once they're beaten together there's no prohibition on doing it again? Or maybe something else? I'm open to any reasoned or sourced answer.
    – msh210
    Sep 19, 2022 at 11:47


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