פירוש על קידושין 7:12

Rabbah explains that if we only had one word, we would assume she goes free at bagrut. We need both words to teach that she goes free at na’arut.

"This comes and teaches about that". Explanation: If only one of them were written, they would have assigned it to whatever seemed better, which would have been bogrut. [Problem:] But if you say: Why would I need "She goes out free" to teach on "There is no money"—I would have been forced not to assign "There is no money" to be about bogrut but rather na'arut, for it is from this that we explain above "But there is money for another master, and who is it? the father"; if so, this verse must be about na'arut, for if it were about bogrut, the father has no rights to her kiddushin, since when she is a bogeret her father has no authority over her!? [Solution:] Says Rabbenu Moshe: If there was no verse "She will go out free", we would have assigned [the 2 extraneous features of the verse] (i) "There is no money" and (ii) the extra י that Ravina talked about, one of them to na'arut, the other to bogrut, but the derashah of "There is no money for this master" we never would have come up with—this is why "She will go out free" is necessary.