Deuteronomy 22:20

In the other case, however, if the man's words were true, and the girl had not been found to be a virgin, the elders were to bring her out before the door of her father's house, and the men of the town were to stone her to death, because she had committed a folly in Israel (cf. Gen 34:7), to commit fornication in her father's house. The punishment of death was to be inflicted upon her, not so much because she had committed fornication, as because notwithstanding this she had allowed a man to marry her as a spotless virgin, and possibly even after her betrothal had gone with another man (cf. Deu 22:23, Deu 22:24). There is no ground for thinking of unnatural wantonness, as Knobel does.

The laws of this chapter provide, I. For the preservation of charity and good neighbourship, in the care of strayed or fallen cattle (Deu 22:1-4). II. For the preservation of order and distinction, that men and women should not wear one another's clothes (Deu 22:5), and that other needless mixtures should be avoided (Deu 22:9-11). III. For the preservation of birds (Deu 22:6, Deu 22:7). IV. Of life (Deu 22:8). V. Of the commandments (Deu 22:12). VI. Of the reputation of a wife abused, if she were innocent (Deu 22:13-19), but for her punishment if guilty (Deu 22:20, Deu 22:21). VII. For the preservation of the chastity of wives (Deu 22:22). Virgins betrothed (Deu 22:23-27), or not betrothed (Deu 22:28, Deu 22:29). And, lastly, against incest (Deu 22:30).