Leviticus 15:18-20

American Standard Version

¹⁸ The woman also with whom a 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 in her ^[a]impurity seven days: and whosoever toucheth her shall be unclean until the even. ²⁰ And everything that she lieth upon in her ^[b]impurity shall be unclean: everything also that she sitteth upon shall be unclean.