בַּיּ֣וֹם הַה֔וּא יָב֥וֹא הַפָּלִ֖יט אֵלֶ֑יךָ לְהַשְׁמָע֖וּת אָזְנָֽיִם׃
אין יענעם טאָג װעט קומען צו דיר אַן אַנטרונענער, דאָס צו מאַכן הערן אין דײַנע אױערן.
Rashi
On that day It is impossible for the fugitive to come on the day of the destruction. Therefore this is the meaning: On that day, [on the day] that the fugitive will come to you to let you hear with your own ears, on that day, your mouth will be opened.
Rashi
to let you hear with your own ears To announce the news that the city has been struck.