Komentarz do Terumot 10:8

גרב – arched, pouched vessel/wine jug.

Introduction This mishnah deals with brine that comes from a barrel in which unclean fish were mixed with clean fish.

כל גרב שהוא מחזיק סאתים – if impure fish was pickled with many pure fish inside the jug/vessel, and the vessel holds two Seah, and there is from the brine of the impure fish at a weigh of ten Zuzim of Judea, which are five Selaim of the Galilee, and all the rest is the brine of pure fish, that is found the brine of impure fish one in nine hundred and sixty [parts] of pure fish, it is prohibited. But, if the brine of the impure fish was less than this, it is permitted.

Unclean fish which was pickled with clean fish:
If the jug contains two seahs and the unclean fish weighs ten zuz in Judean measure, which is five selas in Galilean measure, the brine is forbidden. We have to pay careful attention to the measurements being mentioned here. The jug contains two seahs, which is equivalent to 48 logs. There are ten zuz of unclean fish in Judean measure which is equivalent to five selas in Galilean measure, which equals twenty zuz Judean zuz are twice the size of Galilean zuz. In two seahs there are 9,600 Judean zuz (each log has 200 zuz). So if 1/960 of the mixture’s volume is unclean fish, the brine is prohibited.

רבי יהודה אומר רביעית לסאתים – when there would be one-quarter of a LOG of impure brine within the two Seah of pure brine, everything is forbidden; less than this, it is permitted. And this measure is close to two-hundred, and even though that Rabbi Yehuda holds that it is must be something of the same species but it doesn’t voided/neutralized, for brine is different, for it is mere moisture, and its prohibition is none other than Rabbinic, therefore, Rabi Yehuda states that it is annulled in near to two-hundred.

Rabbi Judah says: it needs be a quarter [of a log] in two seahs. One quarter of a log is equivalent to 50 zuz. So if there are 50/9600 (=1/192) parts unclean fish, Rabbi Judah holds that all of the brine is forbidden.

ורבי יוסי אומר – that it is annulled in sixteen. And the law is that brine is annulled in more than one-thousand, and if there is more than one-thousand from a pure fish and one from an impure fish, it is all permissible,and if not, everything is forbidden.

Rabbi Yose says: one-sixteenth of it. Rabbi Yose says that the unclean fish must be 1/16 of the whole jug before the brine becomes forbidden. This means that unless there are three logs of unclean fish (600 zuz), the brine is still permitted. His is by far the most lenient opinion. The first opinion forbade at ten zuz, and Rabbi Judah at fifty zuz.