Mishnayos Gittin Perek 3 Mishnah 4

Rabbi Elazar ben Perata said three statements before the Sages as testimony from previous generations, and they upheld his statements: He spoke concerning the residents of a town that was surrounded by a camp of besiegers [karkom]; and concerning the travelers in a ship that is cast about in the sea; and concerning one who is going out to be judged in a capital case; that they are all presumed to be alive. However, concerning the residents of a town that was conquered by a camp of besiegers; and the travelers on a ship that was lost at sea; and one who is going out to be executed after receiving his verdict; in these cases one applies to them the stringencies of the living and the stringencies of the dead. How so? An Israelite woman married to a priest in one of these situations or a daughter of a priest married to an Israelite in one of these situations may not partake of teruma. The first woman may not do so because she may partake of teruma only while her husband is alive, and the second may not do so because she may partake of teruma only if he has died.

שְׁלֹשָׁה דְבָרִים אָמַר רַבִּי אֶלְעָזָר בֶּן פַּרְטָא לִפְנֵי חֲכָמִים וְקִיְּמוּ אֶת דְּבָרָיו. עַל עִיר שֶׁהִקִּיפָהּ כַּרְקוֹם, וְעַל הַסְּפִינָה הַמִּטָּרֶפֶת בַּיָּם, וְעַל הַיּוֹצֵא לִדּוֹן, שֶׁהֵן בְּחֶזְקַת קַיָּמִין. אֲבָל עִיר שֶׁכְּבָשָׁהּ כַּרְקוֹם, וּסְפִינָה שֶׁאָבְדָה בַיָּם, וְהַיּוֹצֵא לֵהָרֵג, נוֹתְנִין עֲלֵיהֶן חֻמְרֵי חַיִּים וְחֻמְרֵי מֵתִים, בַּת יִשְׂרָאֵל לְכֹהֵן, וּבַת כֹּהֵן לְיִשְׂרָאֵל, לֹא תֹאכַל בַּתְּרוּמָה: