(3) Whether his flesh run.--This verse defines more minutely the statement in the preceding verse.

15:1-33 Laws concerning ceremonial uncleanness. - We need not be curious in explaining these laws; but have reason to be thankful that we need fear no defilement, except that of sin, nor need ceremonial and burdensome purifications. These laws remind us that God sees all things, even those which escape the notice of men. The great gospel duties of faith and repentance are here signified, and the great gospel privileges of the application of Christ's blood to our souls for our justification, and his grace for our sanctification.And this shall be his uncleanness in his issue,.... Or the sign of it, by which it may be judged whether he is unclean by it or no:

whether his flesh run with his issue; or salivates, or emits a flow of matter like a saliva, or in the manner of spittle:

or his flesh be stopped from his issue; with it, or because of it; because it is gross, as Jarchi says, it cannot come forth freely:

it is his uncleanness; whether it be one or the other, he is reckoned on account of it an unclean person. This was an emblem of the corruption and vitiosity of nature, and of all evil things that are in or flow out of the evil heart of man, which are defiling to him; see Matthew 15:18.