If a man has seen one issue of zov: Bet Shammai says: he is to be compared to [a woman] who observes a day for each day. But Bet Hillel says: he is to be compared to one who has had a seminal emission. Should he see [one day] and on the second it stopped, and on the third day he saw two [issues], or one [issue] that was as copious as two: Bet Shammai says: he is a full zav. But Bet Hillel says: he defiles those objects on which he sits or lies, and must also go into running water, but he is exempt from the sacrifice. Rabbi Elazar ben Yehudah said: Bet Shammai agrees that in such a case he is not real zav. What do they disagree about? The case of one who saw two [issues], or one [issue] that was as copious as two [on one day], and stopped on the second day, and on the third day he saw another [issue]. Bet Shammai says: he is a real zav; But Bet Hillel say: he only defiles those objects on which he sits or lies, and must also go into running water, but he is exempt from the sacrifice.

If he saw one issue on one day and two on the next day, or two on one day and one on the next day, or three on three [consecutive] days, or three nights, he is a full zav.

If he saw one [issue] and it stopped long enough for an immersion and a drying, and after that he saw two issues, or one as copious as two; Or if he saw two [issues] or one as copious as two, and it stopped long enough for an immersion and a drying, and after that he again saw an issue, he is a full zav.

If he saw one issue which was as copious as three, lasting as long [as it takes to go] from Gad-Yav to Shiloah, which is the time it would take to bathe and dry twice, he becomes a full zav. If he saw one issue which was as copious as two, he defiles [objects] on which he lies or sits and he must immerse in running water, but he is exempt from bringing a sacrifice. Rabbi Yose said: they have not spoken of "one issue as copious" unless there was sufficient to make up three.

If he saw one issue during the day and another at twilight, or one at twilight and the other the next day: If he knew that part of the issue occurred at day-time and part the next day, he is certain with regard to a sacrifice and uncleanness. But if it is in doubt whether part [of the issue] occurred at day-time and part on the next day he is certain with regard to uncleanness, but in one of doubt in with regard a sacrifice. If he had seen issues on two separate days at twilight, he is in doubt both with regard to defilement and with regard to a sacrifice. If [he had seen only] one issue at twilight, he is in doubt [also] with regard to [his] defilement.