Leviticus 15:16
“And 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.”
And on the eighth day he shall take to him two turtledoves, or two young pigeons, and come before the Lord unto the door of the tabernacle of the congregation, and give them unto the priest:
And the priest shall offer them, the one for a sin offering, and the other for a burnt offering; and the priest shall make an atonement for him before the Lord for his issue.
And 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.
And every garment, and every skin, whereon is the seed of copulation, shall be washed with water, and be unclean until the even.
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.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“What man soever of the seed of Aaron is a leper, or hath a running issue; he shall not eat of the holy things, until he be clean. And whoso toucheth any thing that is unclean by the dead, or a man whose seed goeth from him;”
“If there be among you any man, that is not clean by reason of uncleanness that chanceth him by night, then shall he go abroad out of the camp, he shall not come within the camp:”
“If there be among you any man, that is not clean by reason of uncleanness that chanceth him by night, then shall he go abroad out of the camp, he shall not come within the camp:”
“Nevertheless Saul spake not any thing that day: for he thought, Something hath befallen him, he is not clean; surely he is not clean.”
“And whosoever toucheth his bed shall wash his clothes, and bathe himself in water, and be unclean until the even.”