וְלָקַ֛ח אֲבִ֥י הנער [הַֽנַּעֲרָ֖ה] וְאִמָּ֑הּ וְהוֹצִ֜יאוּ אֶת־בְּתוּלֵ֧י הנער [הַֽנַּעֲרָ֛ה] אֶל־זִקְנֵ֥י הָעִ֖יר הַשָּֽׁעְרָה׃
女子的父母就要把女子貞潔的憑據拿出來，帶到城門口，交給城中的長老。
Rashi
אבי הנערה ואמה [THEN SHALL] THE FATHER OF THE DAMSEL, AND HER MOTHER [TAKE AND BRING FORTH etc.] — Let those who have reared this depraved child (lit., “evil plant”) be exposed to contempt because of her (Sifrei Devarim 235:9).
Ibn Ezra
The father and mother of the young woman if they are alive, otherwise someone appointed by the Court.
Rashbam
את בתולי, according to the plain meaning this refers to the blood lost when the bride’s hymen was broken, a residue of which is on the sheet of the bed.