Ketubot 55A

לשבח; לשבועה; ולשביעית;

It is also relevant to an increase in value, as she does not collect the main or additional sums from the increased value of the property in a case where the husband’s estate was not sufficient at the time of his death to pay the entire cost of her marriage contract but the heirs later increased the value of the property; to an oath, because if the wife is required to take an oath in order to receive her marriage contract, the additional sum is also included in that oath; and to the Sabbatical Year, as the marriage contract is not annulled with other debts in the Sabbatical Year, and this includes the additional sum as well.

ולכותב כל נכסיו לבניו; לגבות מן הקרקע ומן הזיבורית; וכל זמן שהיא בבית אביה; ולכתובת בנין דכרין.

And with regard to one who writes a document transferring all of his property to his sons and leaves his wife a specific plot of land for her marriage contract, this teaches that she receives both the main and the additional sums of her contract only from that land. The aforementioned halakha also teaches that she collects the payment only from land, and specifically from land of inferior quality; and that a widow loses her ability to collect the main and additional sums as long as she is in her father’s home for more than 25 years after her husband’s death; and the principle also applies to the stipulation in the marriage contract that the male offspring inherit their mother’s dowry when her husband passes away in addition to the inheritance they receive together with their other brothers. These halakhot apply equally to the additional sum of the marriage contract.