Jeremiah

Jeremiah was a prophet that lived in Jerusalem around 600 BC.  He spent his time crying repentance unto the people.  If they did not repent, Jerusalem was going to be destroyed.

The condition in Judah at the time were horrible.  Wickedness was running rampant: adultery, corrupt priests, worshiping idols, and any other thing you could imagine.  According to Jeremiah 7:21-28, they would not obey the Lord and follow His commandments, they forsook the prophets, they followed their evil imaginations, and they would not listen to the Lord.  The worst part of it all was that the people liked it that way.  They were so ingrained in sin that Jeremiah compared their repentance to a leopard trying to lose his spots.  Not that they were beyond forgiveness, but that they simply would not seek it.

Jeremiah preaching to Judah has a great connection to the Book of Mormon.  Right in the very first chapter of 1 Nephi we learn that Nephi and his family lived in Jerusalem.  Lehi, his father had lived there his whole life.  In verse 4 it talks about prophets that had been called to preach repentance because if they would not then Jerusalem would be destroyed.  This is also happening around 600 BC.  One of the prophets mentioned in 1 Nephi is Jeremiah!  Pretty cool to make a connection in the Bible to get an idea of where the Book of Mormon starts.