Who must be a witness to a conversion according to Jewish law?
1 Answer
The talmud quotes a baraisa from rabbi chiya bar abba in the name of rabbi yochanan that a convert must stand before three jewish men who form a beis din. (yevamos 46b) this is further recorded by maimonides in mishneh torah. (issurei biah 14:6)
Not all of those men have to be rabbis. the shulchan aruch states that three laymen can form a beis din, provided at least one of the men is knowledgeable in all the halacha. (choshen mishpat 3:1) The shach however maintains that it is a biblical obligation that all three of the men be knowledgeable. (ibid 3:1)
Nowadays it is almost universal that a convert stand before three trained rabbis.
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There's a line of thought that his wives were converted by batei din of laymen, hence it's surprising to see that claim of the Biblical obligation. Dec 21, 2021 at 10:16
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@Kazibácsi I guess the shach doesn't hold by that line of thought but do bear in mind he is the minority opinion most authorities hold only one dayan needs to be knowledgeable– ezraDec 21, 2021 at 17:03