Genesis 29:27

Fulfil now the seven days of the feast of this, and I will give thee also that for the service which thou shalt serve with me yet seven other years.

FULFILL ‘SHVUA’ (THE WEEK OF) THIS ONE. The word shvua is in the construct state for it is punctuated with a sheva. It thus means the seven days of this wife, referring to the seven days of the wedding feast. These too are the words of Rashi.
But if so, [i.e., if Rashi interprets shvua as referring to the seven days of the wedding feast rather than, more simply, the seven years of labor, thus implying that the seven years of work had been completed], why did not the Rabbi [Rashi] explain the verse above, my days are fulfilled, as referring to the years of work and the condition which were completed, as Onkelos has it, and which is the true sense of the verse, [instead of explaining it as referring to the length of time his mother told him to remain there or to his advanced age]? For merely because the days his mother told him to remain with him were completed or because of his advanced age, Laban would not give him his daughter before the mutually agreed time, and it is enough to expect of Laban that he fulfill his condition. It is according to Onkelos, [who says that Jacob’s seven years of work had been completed], that we are bound to explain, fulfill ‘shvua’ this one, as referring to the seven days of the wedding feast for as Jacob had told him, the days of work had already been completed. So also did Rabbi Abraham ibn Ezra explain it. And I do not know [how the reference here could be to “the seven days of the marriage feast,” as Rashi claims], for “the seven days of the wedding feast” is an ordinance established for Israel by our teacher Moses.
Perhaps we may say that the dignitaries of the nations had already practiced this custom of old, just as was the case with mourning, as it is written, And he made a mourning for his father seven days. And that which the Rabbis have deduced from here in the Yerushalmi and in Bereshith Rabbah, “One must not mix one rejoicing with another,” that is merely a Scriptural intimation based upon the customary practices of the ancient ones prior to the giving of the Torah. But in our Gemara, the Rabbis did not derive it from here, [i.e., from Laban’s statement], but instead they deduced it from the verse, And Solomon held the feast etc.. The Rabbis explain that the first seven days were a feast of dedication of the new Temple, and the second seven days were the feast of Tabernacles, and he did not combine the two festivities into one because “we must not mix …

מלא שבוע זאת, a reference to the seven days of the wedding festivities for Leah.

ונתנה, she will be given to you;

בעבודה אשר תעבוד עמדי , after having wed Rachel. We can confirm this seeing that when Joseph was born, at the end of these seven years, Yaakov wanted to take his leave and to return to his parents.(compare 30,25 “for I have served you for your two daughters”).

ונתנה לך, then they will agree for the younger one to be given to you also.

מלא שבוע זאת, conclude the days of the wedding celebration with this one as your exclusive wife,

ונתנה לך, it is possible to understand the word ונתנה as a passive construction in the feminine mode, or it could be understood as an active mode of the kal conjugation first person plural, meaning “we will give to you,” i.e. with the consent of the local inhabitants. Or, the letter נ represents what we know as the pluralis majestatis, the arrogant, pompous “we” employed by kings etc., people who consider their individual opinions as equivalent or superior to the collective wisdom of their subjects. In Scripture we find an example of this mode of speech in Song of Songs 1,4 משכני אחריך נרוצה, נגילה ונשמחה בך, “draw me after you! Let us run! Let us delight in your love.” There are a number of parallel examples in Scripture. After you will complete enjoying Leah for one week I will also give you Rachel and you may immediately celebrate another seven days of your nuptials with her. It is not proper to allow one celebration to interfere with another celebration at the same time.