דַּבֵּ֞ר אֶל־בְּנֵ֤י יִשְׂרָאֵל֙ לֵאמֹ֔ר אִשָּׁה֙ כִּ֣י תַזְרִ֔יעַ וְיָלְדָ֖ה זָכָ֑ר וְטָֽמְאָה֙ שִׁבְעַ֣ת יָמִ֔ים כִּימֵ֛י נִדַּ֥ת דְּוֺתָ֖הּ תִּטְמָֽא׃
「你要對以色列人說：若有婦人懷孕，生了男孩，她就不潔淨七天；她不潔淨的情形如同她月經不適、需要隔離的日子一樣。
Shenei Luchot HaBerit
Eve's sin was due to her being seduced by the serpent which had mated with her and introduced its pollutant into her body. The potency of that evil-smelling drop of semen caused her to become subject to menstruation at regular intervals; she therefore had to remain in a state of impurity for seven days, corresponding to the days it took to create the universe. She, after all, had damaged the work of the six days of Creation. When a woman gives birth she is also subject to ritual impurity in a similar way to the impurity of menstruating women, as per Leviticus 12,2. This too is due to the original sin for which she has to suffer great pain when giving birth as per Genesis 3,16.