אָ֤ז תִּרְאִי֙ וְנָהַ֔רְתְּ וּפָחַ֥ד וְרָחַ֖ב לְבָבֵ֑ךְ כִּֽי־יֵהָפֵ֤ךְ עָלַ֙יִךְ֙ הֲמ֣וֹן יָ֔ם חֵ֥יל גּוֹיִ֖ם יָבֹ֥אוּ לָֽךְ׃
Dann wirst du bangen, aber gleich dich aufheitern, es bebt und freut sich dein Herz; denn um dich sammeln sich die Völker von den fernen Meeresgegenden, mit Reichtum kommen Völker zu dir.
Rashi on Isaiah
Then you shall see and be radiant Heb. וְנָהַרְתָּ, from נְהוֹרָה, [Aramaic for light,] then you shall see and be radiant [from Jonathan].
Ibn Ezra on Isaiah
Then. When kings come unto thee and bring thee thy children. תראי Thou shalt fear,3A. V., Thou shalt see. I. E. seems to have read תִּֽרְאִי or תִּרְאִי (root ירא), instead of תִּרְאִי. like a man that trembles when help comes to him suddenly, or anything he did not anticipate; this is usually the case with a person who finds something.
Rashi on Isaiah
and your heart shall be startled and become enlarged And your heart shall wonder and become enlarged.