וַתֵּצֵ֤א דִינָה֙ בַּת־לֵאָ֔ה אֲשֶׁ֥ר יָלְדָ֖ה לְיַעֲקֹ֑ב לִרְא֖וֹת בִּבְנ֥וֹת הָאָֽרֶץ׃
(א) בת לאה. וְלֹא בַת יַעֲקֹב? אֶלָּא עַל שֵׁם יְצִיאָתָהּ נִקְרֵאת בַּת לֵאָה, שֶׁאַף הִיא יַצְאָנִית הָיְתָה (בראשית רבה), שֶׁנֶּאֱמַר וַתֵּצֶא לֵאָה לִקְרָאתוֹ (וְעָלֶיהָ מָשְׁלוּ הַמָּשָׁל כְּאִמָּהּ כְּבִתָּהּ):
(טז) וַיָּבֹ֨א יַעֲקֹ֣ב מִן־הַשָּׂדֶה֮ בָּעֶ֒רֶב֒ וַתֵּצֵ֨א לֵאָ֜ה לִקְרָאת֗וֹ וַתֹּ֙אמֶר֙ אֵלַ֣י תָּב֔וֹא כִּ֚י שָׂכֹ֣ר שְׂכַרְתִּ֔יךָ בְּדוּדָאֵ֖י בְּנִ֑י וַיִּשְׁכַּ֥ב עִמָּ֖הּ בַּלַּ֥יְלָה הֽוּא׃
(16) When Jacob came home from the field in the evening, Leah went out to meet him and said, “You are to sleep with me, for I have hired you with my son’s mandrakes.” And he lay with her that night.
(א) ואת אחד עשר ילדיו. וְדִינָה הֵיכָן הָיְתָה? נְתָנָהּ בְּתֵבָה וְנָעַל בְּפָנֶיהָ, שֶׁלֹּא יִתֵּן בָּהּ עֵשָׂו עֵינָיו, וּלְכָךְ נֶעֱנַשׁ יַעֲקֹב שֶׁמְּנָעָהּ מֵאָחִיו, שֶׁמָּא תַּחֲזִירֶנּוּ לַמּוּטָב, וְנָפְלָה בְּיַד שְׁכֶם (בראשית רבה):
ותצא דנה בת לאה, Dinah, Leah's daughter went out, etc. The reason that the Torah emphasises that Dinah was Leah's daughter (something that we are well aware of) is in order to facilitate understanding of the causes underlying Dinah's excursion into town. There were three reasons for this. 1) Dinah was Leah's daughter. Had she been Rachel's daughter she would never have made such an unchaperoned excursion. Her mother Leah had "gone out" to meet her husband (30,15), something that was uncharacteristic of Jewish women. Bereshit Rabbah 80,1 claims that at the time Leah adorned herself with all her jewelry. Her daughter copied her mother, giving the impression that she was a harlot. 2) A second cause for Dinah's excursion was the fact that as an only daughter she had no female playmates; she went in search of suitable company. Inasmuch as she was a daughter of Jacob she had already acquired the reputation of being a distinguished person, something that provoked Shechem as we shall explain later. 3) לראות בבנות הארץ, "she went to take a look at the daughters of the land." According to Pirke de Rabbi Eliezer chapter 38 Shechem had brought the girls of the neighbourhood to play music around the tent of Jacob. This then was a third reason for Dinah venturing outside. From all the above you may surmise that unless Shechem had already been aware of the existence of Dinah, a daughter of the famous Jacob, even before she left her house he would not have committed the rape.
ותצא דינה. מודיע כי דינה לא אשמה בזה, שלא תאמר שפרצה גדר הצניעות, כי היתה בת לאה, שהיתה צנועה באהלה, ואשר ילדה ליעקב, שלידתה היה מתיחס אל יעקב שהיתה צנועה וכשרה, כי לא היתה היציאה ללכת אחרי הבחורים רק לראות בבנות הארץ ובתהלוכותיהן: