וּבְנֵ֨י יַעֲקֹ֜ב בָּ֤אוּ מִן־הַשָּׂדֶה֙ כְּשָׁמְעָ֔ם וַיִּֽתְעַצְּבוּ֙ הָֽאֲנָשִׁ֔ים וַיִּ֥חַר לָהֶ֖ם מְאֹ֑ד כִּֽי־נְבָלָ֞ה עָשָׂ֣ה בְיִשְׂרָאֵ֗ל לִשְׁכַּב֙ אֶת־בַּֽת־יַעֲקֹ֔ב וְכֵ֖ן לֹ֥א יֵעָשֶֽׂה׃
Dumating ang mga anak na lalaki ni Jacob mula sa parang nang marinig nila ito; nagdalamhati ang mga lalaki at labis silang nagalit, sapagkat gumawa siya ng kahiya-hiyang bagay sa Israel nang sipingan niya ang anak na babae ni Jacob, at ang ganitong bagay ay hindi dapat gawin.
Rashi
וכן לא יעשה AND THUS IT OUGHT NOT TO BE DONE — viz., to do violence to a maiden, for even the heathens have trained themselves (literally, have fenced themselves round) against unchastity as a consequence of the Flood which had come upon the world as a punishment for this sin (Genesis Rabbah 80:6).
Chizkuni
מן השדה כשמעם,”returned from the field after hearing (about Dinah’s rape).” They returned prematurely, in a hurry.
Da'at Zekenim
כי נבלה עשה בישראל, “that a vile deed had been committed against Israel;” it would have been a vile deed against anyone, all the more so against the daughter of a man of the stature of Israel.