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Dear Rabbi, in Biblical times did the Jewish people practice polygamy? Were men permitted to marry more than one wife?

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I am planning to get married soon and would like to have some helpful information to distribute to relatives and friends attending the wedding. Especially for the many non-observant people who will be there. I am sure they will be curious and interested in what is going on. Not just about the wedding ceremony, but also about the process leading up to it. Do you have anything I can give to them? Thanks!

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I have stumbled upon a website called "Saw You at Sinai." It's for singles. They request two people as references. Is it ok to have a sibling serve as a reference? Also when someone goes to a traditional matchmaker who makes the first connection generally? One's parents?

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Must a rabbi perform a Jewish wedding? I know people become ordained ministers online so that they can perform Christian weddings for their friends and loved ones. Could someone who is not ordained a rabbi in the Jewish faith perform a wedding as long as all of the other conventions of a Jewish wedding are observed, such as standing under the chuppah, reciting the Sheva Brachot, signing a ketubah, etc.?

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I have a question for your "Ask the Rabbi" series. At a Jewish wedding the groom places the glass under his foot and smashes it into several pieces. What is the significance of this act? I have a friend who is soon to be married and he asked me this question.