And every thing that she lieth upon in her separation shall be unclean: every thing also that she sitteth upon shall be unclean.
A regulation concerning ritual purity during menstruation.
King James Version (public domain)
Traditionally attributed to Moses · c. 13th century BC · The Pentateuch — Genesis, Exodus, Leviticus, Numbers, and Deuteronomy — is traditionally attributed to him
18The woman also with whom man shall lie with seed of copulation, they shall both bathe themselves in water, and be unclean until the even.
19And 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.
20And every thing that she lieth upon in her separation shall be unclean: every thing also that she sitteth upon shall be unclean.
21And whosoever toucheth her bed shall wash his clothes, and bathe himself in water, and be unclean until the even.
22And whosoever toucheth any thing that she sat upon shall wash his clothes, and bathe himself in water, and be unclean until the even.