Yerushalmi Eruvin 10:5 ירושלמי עירובין י׳:ה׳

MISHNAH: A person may stand in a private domain and move something in the public domain, in the public domain and move something in the private, on condition that he not move it more than four cubits. A person may not stand in a private domain and urinate in the public, or in the public and urinate in the private. Similarly, he may not spit. Rebbi Jehudah says, even somebody whose spittle was accumulating should not walk four cubits before spitting¹³Since the spittle is to be spat out, carrying it in the mouth for more than 4 cubits would be a Sabbath violation..

HALAKHAH: Paragraph. Not only⁸⁴The Mishnah is anonymous; it is presumed to follow R. Meïr. But R. Meïr in Mishnah 8 states that one may not stand in one domain and act in another; so either the Mishnah is somebody else’s teaching and should not be formulated as anonymous, or one has to emend to “a person may not stand.” “a person may stand in a private domain and move something in the public domain, in the public domain and move something in the private, on condition that he not move it more than four cubits.” Rav said, a Mishnah says so, “A person may not stand in a private domain and unlock in the public domain, in the public domain and unlock in a private domain unless there was made for him a partition ten hand-breadths high, the words of Rebbi Meïr⁸⁵Mishnah 10:8..”

Rav said, about soot. Rebbi Joḥanan said, about soot⁸⁶For the unintelligible “soot” read כִּיחוֹ “his phlegm”. This refers to the statement of R. Jehudah in the Mishnah that one may not walk with spittle in his mouth. There are two objections to the formulation of the Mishnah, first that spittle may be swallowed and therefore can be carried in one’s mouth and second that for R. Jehudah the moisture remaining in the mouth still should be counted as spittle; if the Mishnah really meant spittle, R. Jehudah should forbid walking in the public domain to everybody., since does not Rebbi Jehudah say, moist fluid creates a connection?

Not only if he stands in a private domain and urinates in the public domain, but even if he stands in the public domain and urinates in the public domain, but if it rolls down into a private domain it is forbidden. Rebbi Yose ben Rebbi Abun said, not only if he stands in the public domain and urinates in a private domain, but even if he stands in a private domain and urinates in a private domain, but if it rolls down into the public domain it is forbidden. Rebbi Yasa said, this implies in a spout standing in the public domain, ten [hand-breadths] high and four wide⁸⁷Which therefore is a separate private domain. For “R. Yasa” read “R. Yose.”, one may not pour water which would roll down and exit.