וְהָֽיְתָ֛ה צְעָקָ֥ה גְדֹלָ֖ה בְּכָל־אֶ֣רֶץ מִצְרָ֑יִם אֲשֶׁ֤ר כָּמֹ֙הוּ֙ לֹ֣א נִהְיָ֔תָה וְכָמֹ֖הוּ לֹ֥א תֹסִֽף׃
And there shall be a great cry throughout all the land of Egypt, such as there hath been none like it, nor shall be like it any more.
Read kabbalistic (mystical) interpretation of Exodus 11:6: and classical mystical sources.