Uktzin 2:9 - 2:10

קישות שנטעה בעציץ (a cucumber which was planted in a pot) – which is not perforated, and became susceptible there to receive ritual impurity and it became defiled, that is considered like it is detached.

והגדילה ויצאה חוץ לעציץ – and it is considered as attached, because it sucks/is nurtured from the ground that is outside of the pot.

טהורה – that defilement flew off from it when it left outside the pot

מה טיבה ליטהר (what is its character that it should be insusceptible to uncleanness) – that when it received defilement it was like it was detached, therefore, whatever is within the pot remains in its defilement and what it added afterwards and left outside of the pot is pure. But the Halakha is not according to Rabbi Shimon.

כלי גללים – a vessel made from the dung of cattle.

שהשרשים יכולים לצאת בהן – even though they are not perforated, the root goes out on its own and perforates the dung and the ground of that vessel. And for this reason, it (i.e., the Mishnah) did not take the language of "כלי אבנים"/stone utensils, because they are hard and the root does not penetrate/perforate them.

עציץ נקוב אינו מכשיר את הזרעים – that are within it. And they don’t receive susceptibility [to receive defilement] because they are considered as attached, and the seeds are not susceptible to receive ritual defilement other than when water comes upon them after they have become detached, and even detached fruit are not made susceptible [to receive ritual defilement] with the water that is within, because the water does not make them susceptible [to receive ritual defilement] when they are attached/connected, for we require that the water is detached and these waters that are placed on a perforated pot, it is like placing it on the ground.

ושאינו נקוב מכשיר את הזרעים – for whether the water is within it or between the seeds, both of them are considered as detached.

מלאהו – to a pot that is not perforated.

עפר עד שפתו (dirt until its rim) – since it sees the atmosphere from four directions, it is like a perforated pot, and it is considered as attached/connected, between the water and between the seeds that are in it.

כטבלא שאין לה לזביז (like a tray lacking a vertical rim/ledge – by which a flat vessel is made into a vessel-like receptacle) – that it lacks a rim from this side and that but is rather flat and smooth, that the water that is in it does not make the seeds susceptible [to receive ritual defilement] and it is considered as attached, since it sees the atmosphere from four directions.