Ketubot 66B

שחתן פוסק ⁠— הוא פוסק פחות חומש.

the son-in-law pledges according to the amount of the dowry that the bride brings, he pledges 1/5th less in the marriage contract, which is the actual value of the property.

גמ׳ תנו רבנן: אין צריך לומר ראשון תלמיד חכם ושני עם הארץ, אלא אפילו ראשון עם הארץ ושני תלמיד חכם, יכול לומר: לאחיך הייתי רוצה ליתן, לך אי אפשי ליתן.

Talmud: The Talmud cites a baraita to expand upon the Mishnah’s statement that the father is not required to give the second son-in-law the gift that he promised the first son-in-law, as follows. A baraita states: Needless to say, this ruling applies when the first is a Torah scholar and the second is an am ha'aretz, since the father-in-law has a reason to refuse to give the second a dowry like the first. But even if the first is an am ha'aretz and the second is a Torah scholar, the father-in-law may say: To your brother, I wanted to give this dowry, but to you I do not want to give it, since the obligation incurred was to a specific individual.

פסקה להכניס לו אלף דינר כו׳. היינו רישא! תנא שומא רבה וקתני שומא זוטא. תנא שומא דידיה, וקתני שומא דידה.

The Mishnah discusses the relationship between the value of the dowry the bride brings in and the amount of money the groom records in the marriage contract, and various examples are illustrated, e.g., if the woman pledged to bring him 1,000 dinars. The Talmud asks: These latter examples in the Mishnah are the same as the first clause of the Mishnah, and they all illustrate the same financial conditions. Why was it not sufficient to mention only the case of the 1,000 dinars? The Talmud explains: The tanna teaches about a large appraisal of her substantial property, and he also teaches about a small appraisal in a case where she has minimal property, to illustrate that there is no halakhic difference between them. Similarly, the tanna teaches about the husband’s own appraisal of how to assess how much she must provide, and he also teaches about the wife’s own initial appraisal that she did and the corresponding amount that he must write.