Rashi on Deuteronomy 22:14/רש"י על דברים כ״ב:י״ד

1 ושם לה עלילת דברים that HE WILL IMPUTE ACTIONS UPON HER BY MERE WORDS (i.e. he will slander her); one sin brings another sin in its train: if he transgresses the prohibition “thou shalt not hate [thy fellow]” (Leviticus 19:17), the end will be that he will fall into slander (cf. Sifrei Devarim 235:3).

2את האשה הזאת THIS WOMAN — Hence we derive the law that one must not speak anything to the judge except in the presence of the opposing party (Sifrei Devarim 235:6).