Commento su Deuteronomio 22:20

ואם אמת היה הדבר BUT IF THE THING BE TRUE — proven by evidence of witnesses and after legal warning that she had committed adultery after her betrothal (Ketubot 44b).

Through witnesses, and with a pre-warning, etc. Otherwise, why is she stoned? For even if it is true that she behaved promiscuously, perhaps she did so before her marriage. And even if she behaved promiscuously after her marriage, perhaps she acted without witnesses or pre-warning. Therefore Rashi explains, “Through witnesses, etc.”

V. 20. ואם אמת היה הדבר הזה וגו׳, es hat der Vater nicht die Zeugen des Mannes vermittelst Gegenzeugen durch הומה zu entkräften gewusst, oder es sind die Gegenzeugen des Vaters selbst wieder vermittelst anderer Gegenzeugen als עדים זוממין erwiesen worden.