Reference for Bekhorot 104:39

אף היורש את אשתו יחזיר לבני וכו':

And if he holds that a man's inheritance of his wife's estate is only a rabbinical law, what claim is there to the money?<span class="x" onmousemove="('comment',' By him, since it is not a genuine inheritance.');">²⁵</span>

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