וְל֤וֹא הָֽיְתָה֙ סְדֹ֣ם אֲחוֹתֵ֔ךְ לִשְׁמוּעָ֖ה בְּפִ֑יךְ בְּי֖וֹם גְּאוֹנָֽיִךְ׃
Ибо сестра твоя Содом не упоминался устами твоими в день гордости твоей;
Rashi
Now, was not Sodom your sister, etc. This is a [rhetorical] question.
Rashi
a report in your mouth [by which] to reprove many and to say, Beware that you should not be overturned like Sodom, as though it were recent news to you.