Leviticus 15:16-19 (King James Version)

 ¹⁶And if any man's seed of copulation go out from him, then he shall wash all his flesh in water, and be unclean until the even.

 ¹⁷And every garment, and every skin, whereon is the seed of copulation, shall be washed with water, and be unclean until the even.

 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.