וַתִּשְׁכַּ֞ח יְהוָ֣ה עֹשֶׂ֗ךָ נוֹטֶ֣ה שָׁמַיִם֮ וְיֹסֵ֣ד אָרֶץ֒ וַתְּפַחֵ֨ד תָּמִ֜יד כָּל־הַיּ֗וֹם מִפְּנֵי֙ חֲמַ֣ת הַמֵּצִ֔יק כַּאֲשֶׁ֥ר כּוֹנֵ֖ן לְהַשְׁחִ֑ית וְאַיֵּ֖ה חֲמַ֥ת הַמֵּצִֽיק׃
And hast forgotten the LORD thy Maker, That stretched forth the heavens, And laid the foundations of the earth; And fearest continually all the day Because of the fury of the oppressor, As he maketh ready to destroy? And where is the fury of the oppressor?
Read Jewish philosophical commentary on Isaiah 51:13: and classical philosophical sources.