Study Yevamot folio 54B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
the matter depends upon days, not blood. Although the flow of blood causes her to become impure, she remains impure for a full 7 days regardless of whether she continues to experience menstrual bleeding for the duration of that time period. Similarly, in the case of a brother’s wife, God makes her
Rather, the Talmud refutes the derivation in the following manner: What comparison can be drawn from a menstruating woman and a brother’s wife, which are unique in that what renders them prohibited does not render them permitted? Each becomes permitted due to an external factor, i.e., the passing
Rather, the Talmud offers another source for the halakha that the initial stage of sex is considered sex. R' Yona said, and some say it was Rav Huna, son of Rav Yehoshua: The verse states at the end of the chapter on forbidden sex: “For whoever shall do any of these abominations, the souls that do
The Talmud further asks: But if that is the source of this halakha, why do I need the term nidda that is written with regard to a brother’s wife? The Talmud answers that it is needed for that which Rav Huna taught, as Rav Huna said: From where in the Torah is there a hint to the halakha of a yevama
The Talmud remains puzzled: No proof is needed for this halakha either, as this is based upon logical reasoning: From the fact that God says the woman is permitted to her brother-in-law after her husband’s death it may be inferred that in her husband’s lifetime she is forbidden to him.