Eruvin 88A

אנשי טבריא כמי שלא יבטל ממלאכתו דמי.

the inhabitants of Tiberias are considered like one who does so in order not to neglect his usual work. Most of them are ordinary laborers. It can be assumed that if they rose early to bring home straw or stalks in which to store their produce, they did so only to save work time.

ומסתפגין באלונטית מאי היא, דתניא: מסתפג אדם באלונטית, ומניחה בחלון. ולא ימסרנה לאוליירין מפני שחשודין על אותו דבר. רבי שמעון אומר: אף מביאה בידו לתוך ביתו.

The Talmud turns to the third activity that R' Ḥananya ben Akavya permitted for the inhabitants of Tiberias: And they may dry themselves with a towel. What is this halakha? As it was taught in a baraita: A person who washed himself in cold water on Shabbat or a Festival may dry himself with a towel and place it on a window, as there is no concern that he perform the prohibited labor of wringing out the towel. And he may not give the towel to the bathhouse attendants [olayerin] because they are suspected with regard to that matter, as they might wring out the towel before giving it to other bathers. Furthermore, one may not bring the towel home because if he does so, he might forget and wring it out. R' Shimon said: He may even bring the towel in his hand to his house, as there is no concern lest he wring it.

אמר רבה בר רב הונא: לא שנו אלא למלאות, אבל לשפוך ⁠— אסור.

Rabba bar Rav Huna: They taught the leniency of partitions surrounding a hole in a balcony only with regard to drawing water through the hole; but to pour waste water down the hole, it is prohibited.

מתקיף לה רב שיזבי: וכי מה בין זה לעוקה?

Rav Sheizvi raised an objection against this halakha: And what is the difference between this case of a hole in the balcony and that of a pit [uka] used in a courtyard for waste water? The rabbis rule in the next Mishnah below that one who digs a pit with a capacity of two se’a in a small courtyard that is less than 4 cubits may pour waste water into the courtyard on Shabbat, even if the pit was full before Shabbat. He need not be concerned that this will cause water to flow out of the courtyard into the public domain on Shabbat.