Torah: Laws of Tumah and Separation
Leviticus 15:19-28
These verses detail the period of a woman's ritual impurity and the separation it entails, laying out the Torah-mandated structure of cyclical separation and renewal in married life.
וְאִשָּׁה֙ כִּֽי־תִהְיֶ֣ה זָבָ֔ה דָּ֛ם יִהְיֶ֥ה זֹבָ֖הּ בִּבְשָׂרָ֑הּ שִׁבְעַ֤ת יָמִים֙ תִּהְיֶ֣ה בְנִדָּתָ֔הּ וְכׇל־הַנֹּגֵ֥עַ בָּ֖הּ יִטְמָ֥א עַד־הָעָֽרֶב׃ וְאִ֡ם שָׁכֹב֩ יִשְׁכַּ֨ב אִ֜ישׁ אֹתָ֗הּ וּתְהִ֤י נִדָּתָהּ֙ עָלָ֔יו וְטָמֵ֖א שִׁבְעַ֣ת יָמִ֑ים וְכׇל־הַמִּשְׁכָּ֛ב אֲשֶׁר־יִשְׁכַּ֥ב עָלָ֖יו יִטְמָֽא׃ {ס} וְאִֽם־טָהֲרָ֖ה מִזּוֹבָ֑הּ וְסָ֥פְרָה לָּ֛הּ שִׁבְעַ֥ת יָמִ֖ים וְאַחַ֥ר תִּטְהָֽר׃
When a woman has a discharge, her discharge being blood from her body, she shall remain in her menstrual separation seven days; whoever touches her shall be impure until evening. And if a man lies with her, her menstrual separation applies to him; he shall be impure seven days, and any bedding on which he lies shall become impure. When she becomes purified of her discharge, she shall count off seven days, and after that she shall be pure.
Why it matters — The cyclical structure of separation and reunion that underlies hilchos niddah's benefit to marriage is rooted directly in these Torah verses.