לֹ֤א יִֽיגְעוּ֙ לָרִ֔יק וְלֹ֥א יֵלְד֖וּ לַבֶּהָלָ֑ה כִּ֣י זֶ֜רַע בְּרוּכֵ֤י יְהוָה֙ הֵ֔מָּה וְצֶאֱצָאֵיהֶ֖ם אִתָּֽם׃
They shall not labour in vain, Nor bring forth for terror; For they are the seed blessed of the LORD, And their offspring with them.
Read Kabbalistic (mystical) interpretations of Isaiah 65:23: Zohar and classical Jewish mystical sources, free online.