John Gill Commentary Leviticus 15:32

"This is the law of him that hath an issue, and of him whose seed of copulation goeth from him, so that he is unclean thereby;" — Leviticus 15:32 (ASV)

This [is] the law of him that has an issue
In (Leviticus 15:32Leviticus 15:33) is a recapitulation of the several laws in this chapter, as of a man that has a "gonorrhoea": and [of him] whose seed goes from him, and is defiled therewith ;
involuntarily, that suffers a nocturnal pollution.