Zavim 1:5 - 1:6

כמין גד יון לשילוח – a place in Jerusalem that the Canaanite kings preserved idolatrous worship, and that same place was distant from the Shiloah as a measure [of time] of twice bathing and getting dry. Like from Gad Yon. It is the language of (Isaiah 65:11): “Who set a table for Luck” (a name of heathen deity). Shiloah is the name of the river, as it is written (Isaiah 8:6): “Because that people has spurned the gently flowing waters of Siloam” (the conduit – and later the tunnel – of Siloam conveyed into Jerusalem the waters of Gihon, which symbolize “The LORD of Hosts who dwells on Mount Zion – see verse 18).

מטמא משכב ומושב – that we consider it as two sightings.

אלא אם ען יש בה כדי שלש (unless it sufficed to make up three [emissions]) – as for exzmple like from Gad Yon to Shiloah, for then it is considered like a complete Zav, even with regard to the sacrifice. But with one profuse as two, they do not divide it, and it is considered like one sighting. But the Halakha is not according to Rabbi Yossi.

אם ידוע שמקצת הראיה מהיום וקצתה למחר – that he saw part of the appearance [of the flux] at the end of today and part of it at the beginning of the night of the morrow, even though there weren’t between them [sufficient time] in order to perform [both] the ritual immersion and the drying off, they are considered as two appearances [of flux], because the days divide them.

ודאי לקרבן ולטומאה – that there are three appearances [of flux] here. And that of at twilight is divided into two [appearances], since there is in it from two [different and consecutive] days.

ואם ספק – that perhaps all of it is from today or all of it is from the night.

ודאי לטומאה – for at any event, there are two [appearances].

וספק לקרבן – for we are in doubt that perhaps there are two [appearances], perhaps three [appearances of flux]. For if all of it is from the day or all of it is from the night, there are two [appearances of flux]. But if it is from part of the day and part of the night, there are three {appearances of flux].

שני ימים בין השמשות – as for example, that the first [appearance] is at the beginning at the first twilight, and the second is at the end of the second twilight, as for example, that the first [appearance] is on Friday/the Eve of the Sabbath at the beginning of twilight and one is on Saturday night at the conclusion of twilight. For if the beginning of twilight is day and the end of twilight is night, we don’t have two appearances [of flux] on two consecutive days, for Shabbat interrupts and there isn’t the defilement of gonorrhea (but rather, like a person with an emission). But if the entire twilight from the day or all of it is from the night, there are two appearances here on two consecutive days, and which require counting seven clean [days] and one is exempt from the sacrifice. But if the beginning of twilight or at its end, half of it is from the day and half of it is from the light, the appearance [of flux] was divided into two and one is required to bring a sacrifice. But because there are all of these doubts, it is taught [in the Mishnah]: "ספק לטומאה ולקרבן"/”he is in doubt as to its imparting uncleanness and in doubt as to bring a sacrifice, lest there isn’t uncleanness here, and lest there is uncleanness here but not a sacrifice, or lest thee is [both] uncleanness here and a sacrifice. Therefore, he brings a sacrifice, but it is not consumed.