Leviticus 15:3

רר [WHETHER HIS FLESH] DRIP — This word is connected with ריר "spittle" — the meaning is that his flesh runs with its issue as spittle, i. e. that it (the flow) comes forth clear in appearance (not thick and troubled). או החתים OR [HIS FLESH] BE STOPPED — it means, that the flow issues thick and closes up the orifice of the membrum, so that his flesh is stopped up by the drop that issued from him. This is its literal meaning. The Halachic explanation is: The first verse (v. 2) enumerates two appearances of the issue and then terms him (the man affected by them) unclean, for it is said, "when there flows from his flesh a flowing he is unclean" and the other verse (v. 3) enumerates three appearances of the issue and only then terms him unclean, as it is said, "his uncleanness through his flow: if his flesh drips through its flow as with spittle, or if his flesh is stopped up through his flowing then only is it his uncleanness!" How can this be reconciled? Two appearances of the flow serve to make him unclean, and the third obligates him also to bring an offering (Niddah 43b; Megillah 8a).

וְזֹ֛את תִּהְיֶ֥ה טֻמְאָת֖וֹ בְּזוֹב֑וֹ רָ֣ר בְּשָׂר֞וֹ אֶת־זוֹב֗וֹ אֽוֹ־הֶחְתִּ֤ים בְּשָׂרוֹ֙ מִזּוֹב֔וֹ טֻמְאָת֖וֹ הִֽוא׃

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.