וְאַתָּ֡ה אַל־תִּירָא֩ עַבְדִּ֨י יַעֲקֹ֤ב נְאֻם־יְהֹוָה֙ וְאַל־תֵּחַ֣ת יִשְׂרָאֵ֔ל כִּ֠י הִנְנִ֤י מוֹשִֽׁיעֲךָ֙ מֵֽרָח֔וֹק וְאֶֽת־זַרְעֲךָ֖ מֵאֶ֣רֶץ שִׁבְיָ֑ם וְשָׁ֧ב יַעֲקֹ֛ב וְשָׁקַ֥ט וְשַׁאֲנַ֖ן וְאֵ֥ין מַחֲרִֽיד׃
Therefore fear thou not, O Jacob My servant, saith the LORD; Neither be dismayed, O Israel; For, lo, I will save thee from afar, And thy seed from the land of their captivity; And Jacob shall again be quiet and at ease, And none shall make him afraid.
Read halakhic rulings (Jewish law) on Jeremiah 30:10: and classical halakhic sources.