Isaiah 66:10 Halakhah

שִׂמְח֧וּ אֶת־יְרוּשָׁלִַ֛ם וְגִ֥ילוּ בָ֖הּ כָּל־אֹהֲבֶ֑יהָ שִׂ֤ישׂוּ אִתָּהּ֙ מָשׂ֔וֹשׂ כָּל־הַמִּֽתְאַבְּלִ֖ים עָלֶֽיהָ׃

Rejoice ye with Jerusalem, And be glad with her, all ye that love her; Rejoice for joy with her, All ye that mourn for her;