Leviticus 15:3

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.

Ver. 3. It is his uncleanness.] Hereby they were taught the turpitude of sin, of original sin especially, that peccatum peccans, as the Schools call it; that sinful sin, as St Paul, Rom 7:13 for so filthy it is, that he can call it no worse than by its own name, as wanting a fitter epithet.