Kesuvos4: 10
לֹא כָתַב לָהּ: ,,בְּנִין דִּכְרִין דְּיֶהֱווּ לִיכִי מִנַּאי אִינוּן יִרְתוּן כְּסַף כְּתֻבְּתִיךְ יָתֵר עַל חוּלְקֵיהוֹן דְּעִם אֲחֵיהוֹן” — חַיָּב, שֶׁהוּא תְנַאי בֵּית דִּין.
[If] he did not write for her: “Sons that you will have from me —- they will inherit the money of your kesubah above what they share with their brothers,” he is [nevertheless] liable, since it is a condition established by the court.
Kesuvos4: 11
],,בְּנָן נוּקְבָן דְּיֶהֶוְיָן לִיכִי מִנַּאי יֶהֶוְיָן יָתְבָן בְּבֵיתִי וּמִתַּזְנָן מִנִּכְסַי עַד דְּתִנַּסְבָן לְגוּבְרִין” — חַיָּב, שֶׁהוּא תְנַאי בֵּית דִּין.
[If he did not write:] “Daughters that you will have from me shall live in my house and be supported from my property until they are married,” he is [nevertheless] liable, since it is a condition established by the court.