Mishnayos Kesuvos Perek 4 Mishnah 7

If a husband did not write a marriage contract for his wife, a virgin collects two hundred dinars and a widow one hundred dinars upon divorce or the husband’s death, because it is a stipulation of the court that a wife is entitled to these amounts. If he wrote in her marriage contract that she is entitled to a field worth one hundred dinars instead of the two hundred dinars to which she is actually entitled, and he did not additionally write for her: All property I have shall serve as a guarantee for the payment of your marriage contract, he is nevertheless obligated to pay the full two hundred dinars; and he cannot say that she should take only a mortgaged field for payment of her marriage contract, as it is a stipulation of the court that all his property is held as surety for the entire sum.

לֹא כָתַב לָהּ כְּתֻבָּה, בְּתוּלָה גּוֹבָה מָאתַיִם, וְאַלְמָנָה מָנֶה, מִפְּנֵי שֶׁהוּא תְנַאי בֵּית דִּין. כָּתַב לָהּ, שָׂדֶה שָׁוֶה מָנֶה תַּחַת מָאתַיִם זוּז, וְלֹא כָתַב לָהּ, כָּל נְכָסִים דְּאִית לִי אַחֲרָאִין לִכְתֻבְּתִיךְ, חַיָּב, שֶׁהוּא תְנַאי בֵּית דִּין: