Eruvin 104A

שלש על שלש ⁠— חוצצות, פחות משלש ⁠— אין חוצצות, והיינו דרבא אמר רב חסדא.

If the fabric was 3 fingerbreadths by 3 fingerbreadths, it interposes; but if it was less than 3 fingerbreadths by 3 fingerbreadths, it does not interpose. And this is the same teaching that Rava said that Rav Ḥisda said.

לימא פליגא דרב יהודה בריה דרבי חייא? שאני צלצול קטן דחשיב.

The Talmud suggests: Let us say that this disagrees with the opinion of Rav Yehuda, son of R' Ḥiyya, who prohibits a sash even smaller than 3 fingerbreadths by 3 fingerbreadths. The Talmud rejects this contention: This is not necessarily so, as a small sash is different, since it is significant. It is therefore like a garment, even if it is smaller than 3 fingerbreadths by 3 fingerbreadths.

ולרבי יוחנן: אדאשמעינן גמי לישמעינן צלצול קטן!

The Talmud raises a question: And according to the opinion of R' Yoḥanan: Rather than teaching us the halakha with regard to a reed, let the Mishnah teach us that a priest may wrap his wounded finger with a small sash, as that does not constitute an interposition.

מילתא אגב אורחיה קא משמע לן, דגמי מסי.

The Talmud explains: The tanna teaches us another matter in passing, that a reed heals. However, as far as a priest involved in the service in concerned, there is no concern with regard to this prohibition either, as it is also a rabbinic decree that is not in effect in the Temple.

מתני׳ בוזקין מלח על גבי כבש בשביל שלא יחליקו, וממלאין מבור הגולה ומבור הגדול בגלגל בשבת, ומבאר הקר ביום טוב.

Mishnah: One may scatter salt on Shabbat on the ramp that leads to the altar so that the priests will not slip on their way up. And likewise, one may draw water from the Cistern of the Exiles and from the Great Cistern, which were located in the Temple, by means of the wheel designed for drawing water, even on Shabbat. And one may draw water from the Heker Well only on a Festival.