Leviticus 15:18
"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."
Cross References (ranked by relevance)
And he said unto the people, Be ready against the third day: come not at your wives.
And whosoever toucheth his bed shall wash his clothes, and bathe himself in water, and be unclean until the even.
Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body.
Dearly beloved, I beseech you as strangers and pilgrims, abstain from fleshly lusts, which war against the soul;
Behold, I was shapen in iniquity; and in sin did my mother conceive me.
Flee also youthful lusts: but follow righteousness, faith, charity, peace, with them that call on the Lord out of a pure heart.
All things are lawful unto me, but all things are not expedient: all things are lawful for me, but I will not be brought under the power of any.
Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.