אבן העזר קי״אEven HaEzer 111

Se’if 1א׳

מִתְּנָאֵי הַכְּתֻבָּה שֶׁיִּהְיוּ בָּנָיו הַזְּכָרִים יוֹרְשִׁים כְּתֻבַּת אִמָּן וּנְדוּנְיָתָהּ שֶׁהִכְנִיסָה בְּתוֹרַת נִכְסֵי צֹאן בַּרְזֶל, וְיֵשׁ אוֹמְרִים שֶׁאַף הַתּוֹסֶפֶת בִּכְלָל, וְאַחַר כָּךְ חוֹלְקִים הַשְּׁאָר עִם אֲחֵיהֶם בְּשָׁוֶה. כֵּיצַד, נָשָׂא אִשָּׁה, כְּתֻבָּתָהּ וּנְדוּנְיָתָהּ אֶלֶף, וְיָלְדָה בֵּן וּמֵתָה בְּחַיָּיו; וְאַחַר כָּךְ נָשָׂא אִשָּׁה אַחֶרֶת, כְּתֻבָּתָהּ וּנְדוּנְיָתָהּ מָאתַיִם וְיָלְדָה בֵּן וּמֵתָה בְּחַיָּיו; וְאַחַר כָּךְ מֵת הוּא וְהִנִּיחַ אַלְפַּיִם; בְּנוֹ מִן הָרִאשׁוֹנָה יוֹרֵשׁ אֶלֶף שֶׁבִּכְתֻבַּת אִמּוֹ, וּבְנוֹ מִן הַשְּׁנִיָּה יוֹרֵשׁ מָאתַיִם שֶׁבִּכְתֻבַּת אִמּוֹ, וְהַשְּׁאָר יוֹרְשִׁים אוֹתוֹ בְּשָׁוֶה; נִמְצָא בְּיַד בֶּן הָרִאשׁוֹנָה אֶלֶף וְאַרְבַּע מֵאוֹת, וּבְיַד בֶּן הַשְּׁנִיָּה שֵׁשׁ מֵאוֹת:

Among the stipulations of the writ [of marital obligations] is that his sons inherit [the amount listed in] their mother's writ and such dowry as she brought [into the marriage] as 'iron sheep property' [i.e. property she brought into the marriage which her husband can use and which he must pay her for at its original value on termination of the marriage]. Some say also the extra [amounts listed in the writ] are included [in their inheritance]. Thereafter, they divide the remainder evenly with their [other] brothers. How? [Suppose] he married a woman; [the money listed in] her writ and dowry is 1000; she gave birth to a son; and she died during [her husband's] lifetime. Thereafter he married another woman; [the amount listed in] her writ and dowry is 200; she gave birth to a son; and she [also] died during his lifetime. Then he died and left 2000. His son from the first [wife] inherits the 1000 [listed] in his mother's writ, his son from the second [wife] inherits the 200 listed in his mother's writ, and they evenly inherit the balance. It turns out that in the [wife]'s son possession is 1400 and in the second's son is 600.

Se’if 2ב׳

בַּמֶּה דְבָרִים אֲמוּרִים, שֶׁהִנִּיחַ יוֹתֵר עַל שְׁתֵּי הַכְּתֻבּוֹת דִּינָר אֶחָד אוֹ יוֹתֵר כְּדֵי שֶׁיַּחַלְקוּ הַשְּׁאָר בְּשָׁוֶה. אֲבָל אִם לֹא הִנִּיחַ יוֹתֵר דִּינָר, חוֹלְקִים הַכֹּל בְּשָׁוֶה; שֶׁאִם יָרְשׁוּ אֵלּוּ כְּתֻבַּת אִמָּן וְלֹא יִשָּׁאֵר דִּינָר אֶחָד לַחֲלֹק אוֹתוֹ בֵּין הַיּוֹרְשִׁים, נִמְצֵאתָ תְּנַאי זֶה מְבַטֵּל חֵלֶק יְרֻשָּׁה בֵּין הַבָּנִים בְּשָׁוֶה שֶׁהוּא מִן הַתּוֹרָה:

In what [case] is the [foregoing] said? Where he left, beyond the [money for] the two writs, a dinar or more, so that they should divide the balance evenly. But if he did not leave an additional dinar, they divide the entire [amount] evenly. [This is] because, if these inherit [the amounts in] their mothers' writs and not a single dinar remains to divide among the heirs, then it turns out that this stipulation annuls the even division of inheritance among sons, which is [a rule] from the Torah.

Se’if 3ג׳

אִם אֵין שָׁם יוֹתֵר עַל שְׁתֵּי הַכְּתֻבּוֹת דִּינָר, אֲפִלּוּ הָיָה רָאוּי לִפֹּל יְרֻשָּׁה מֵאֲבִי אֲבִיהֶם בְּעִנְיָן שֶׁהָיָה שָׁם מוֹתָר, לָא חֲשִׁיב מוֹתָר, אֲפִלּוּ מֵת (אֲבִי) אֲבִיהֶם קֹדֶם שֶׁיַּחַלְקוּ, כֵּיוָן שֶׁלֹּא הָיָה שָׁם מוֹתָר דִּינָר בִּשְׁעַת מִיתָה:

If there is not [staked] here on a ketuba more than 2 dinar (units of money), even [if] it was fitting [because of] the lost inheritance from the father of their father, categorically this is not permitted, [since the amount,] it is not important [enough to be] permitted. Even if [the father of] their father died, giving her a [good] portion takes precedence, also it is not permitted here [to give only] a dinar in a time of death.