Leviticus 15:18-20

King James Version

¹⁸ The woman also with whom man shall lie with seed of copulation, they shall both bathe themselves in water, and be unclean until the even.

¹⁹ And if a woman have an issue, and her issue in her flesh be blood, she shall be put apart seven days: and whosoever toucheth her shall be unclean until the even.

²⁰ And every thing that she lieth upon in her separation shall be unclean: every thing also that she sitteth upon shall be unclean.