Jeremiah 1:17-19

17Thou, therefore, gird up thy loins, and arise, and speak unto them all that I shall command thee: be not dismayed at them, lest I cause thee to be dismayed before them. 18And I, behold, I appoint thee this day as a strong city, and an iron pillar, and brazen walls, against the whole land; against the kings of Judah, against its princes, against its priests, and against the people of the land. 19And they shall fight against thee, but they shall not prevail against thee: for I am with thee, saith Jehovah, to deliver thee.