אִם־יִתָּקַ֤ע שׁוֹפָר֙ בְּעִ֔יר וְעָ֖ם לֹ֣א יֶחֱרָ֑דוּ אִם־תִּהְיֶ֤ה רָעָה֙ בְּעִ֔יר וַיהוָ֖ה לֹ֥א עָשָֽׂה׃
Shall the horn be blown in a city, And the people not tremble? Shall evil befall a city, And the LORD hath not done it?
Read Kabbalistic (mystical) interpretations of Amos 3:6: Zohar and classical Jewish mystical sources, free online.