Musar do Izajasza 66:10
שִׂמְח֧וּ אֶת־יְרוּשָׁלִַ֛ם וְגִ֥ילוּ בָ֖הּ כָּל־אֹהֲבֶ֑יהָ שִׂ֤ישׂוּ אִתָּהּ֙ מָשׂ֔וֹשׂ כָּל־הַמִּֽתְאַבְּלִ֖ים עָלֶֽיהָ׃
Cieszcie się wraz z Jeruszalaim, a radujcie się niém wszyscy, którzy je miłujecie, weselcie się z niém weselem jego wszyscy, którzyście płakali nad niém.
Orchot Tzadikim
Therefore, one should concern himself and weep because of the Torah which is forgotten and should lament for those who revere God, Blessed be He, and have been rejected by men, and should complain bitterly over the little piety that exists and over Israel, the people of the Lord, trodden under foot, and he should raise Jerusalem over his greatest joy and may he merit to behold her joy, as it is written : "Rejoice for joy with her; all ye that mourn for her" (Is. 66:10).
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