Mishnayos Challah Perek 2 Mishnah 2

עפר חו"ל הבא מספינה לארץ – we are speaking about a perforated ship, and clods of earth close up the perforation so that water cannot enter in it.

חייבת במעשרות – if he sowed and grew seeds in the dust/mud that is in the ship, and even though that is dust/mud from outside of the Land of Israel, for since it is perforated, the seed absorbs from the moistness of the dust/mud of the Land of Israel.

אימתי בזמן שהספינה גוששת – it comes in contact with clumps of dust/mud, that is to say, that it is cleaves to the earth.

עיסה שנילושה במי פירות חייבת בחלה – In the Jerusalem Talmud it proves a bit that the Halakha is not like the anonymous Mishnah. Dough that was kneaded in fruit juice is exempt from Hallah. Therefore, we should not knead dough that has in it the measurement for Hallah in the juice of eggs or in fruit juice alone without a combination of water, since the Halakah is not made clear if it is liable for Hallah or exempt.

ונאכלת בידים מסואבות – for food does not become susceptible to becoming ritually impure until water comes upon it, or one of the seven liquids, and [just as] it does not become susceptible to becoming ritually impure, unclean hands do not defile it.