When the man has been cleansed from his discharge, he must count off seven days for his cleansing, wash his clothes, and bathe himself in fresh water, and he shall be clean.
We have here the law concerning the ceremonial uncleanness that was contracted by running issues in men. It is called in the margin (Lev 15:2) the running of the reins: a very grievous and loathsome disease, which was, usually the effect and consequent of wantonness and uncleanness, and a dissolute course of life, filling men's bones with the sins of their youth, and leaving them...
Commenting on Leviticus 15:1-18
And when he that hath an issue is cleansed of his issue,.... That is, it is ceased from him, as the Targum of Jonathan and Jarchi explain it; for otherwise, according to the ceremonial law, he was not yet cleansed, until he had done everything next prescribed; but when he perceived there was an entire stop put to his disorder: then he shall number to...
then he shall number to himself seven days for his cleansing--Like a leprous person he underwent a week's probation, to make sure he was completely healed. Then with the sacrifices prescribed, the priest made an atonement for him, that is, offered the oblations necessary for the removal of his ceremonial defilement, as well as the typical pardon of his sins.