Jeremiah 11:2

Hear ye the words of this covenant, and speak unto the men of Judah, and to the inhabitants of Jerusalem;

Hearing and proclaiming the words of the covenant was Jeremiah's earnest plea wherever he ministered in his work of reform. In that appeal he called the people back to Israel's richest heritage in the Scriptures of truth. Those covenant words were to give them a full understanding of God's purpose. That purpose was to extend to all nations a knowledge of saving truth.