Leviticus 15:2
“Speak unto the children of Israel, and say unto them, When any man hath a running issue out of his flesh, because of his issue he is unclean.”
And the Lord spake unto Moses and to Aaron, saying,
Speak unto the children of Israel, and say unto them, When any man hath a running issue out of his flesh, because of his issue he is unclean.
And this shall be his uncleanness in his issue: whether his flesh run with his issue, or his flesh be stopped from his issue, it is his uncleanness.
Every bed, whereon he lieth that hath the issue, is unclean: and every thing, whereon he sitteth, shall be unclean.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“In that day there shall be a fountain opened to the house of David and to the inhabitants of Jerusalem for sin and for uncleanness.”
“And he said, That which cometh out of the man, that defileth the man.”
“And, behold, a woman, which was diseased with an issue of blood twelve years, came behind him, and touched the hem of his garment:”
“Command the children of Israel, that they put out of the camp every leper, and every one that hath an issue, and whosoever is defiled by the dead:”
“Much every way: chiefly, because that unto them were committed the oracles of God.”