וַיֹּ֣אמֶר לֵ֔כִי וַיִּשְׁלַ֥ח אוֹתָ֖הּ שְׁנֵ֣י חֳדָשִׁ֑ים וַתֵּ֤לֶךְ הִיא֙ וְרֵ֣עוֹתֶ֔יהָ וַתֵּ֥בְךְּ עַל־בְּתוּלֶ֖יהָ עַל־הֶהָרִֽים׃
Kata Yefta: “Pergilah.” Lalu ia membiarkan dia pergi selama dua bulan. Maka pergilah ia bersama teman-temannya, lalu ia menangisi kegadisannya di pegunungan.
Rashi
Wept over her maidenhood. Since it is not written "over her maidens," the inference is, over her actual maidenhood.