Rashi on Deuteronomy 22:21/רש"י על דברים כ״ב:כ״א

1אל פתח בית אביה [THEN THEY SHALL BRING THE DAMSEL] TO THE ENTRANCE OF HER FATHER’S HOUSE — suggesting: “See what a child (lit., a plant) you have reared!” (Ketubot 45a).

2אנשי עירה [AND] THE MEN OF HER CITY [SHALL OVERWHELM HER WITH STONES] — This means, the witnesses shall stone her, all the men of her city standing by (Sifrei Devarim 240:1; cf. Rashi on Leviticus 24:14).

3לזנות בית אביה TO PLAY THE WHORE “IN” HER FATHER’S HOUSE — The word בית is equivalent to בבית.