Hi everyone
 
The new covenant is spoken about first in the book of Jeremiah. The old covenant that God had established with His people required obedience to the Old Testament Mosaic law. Because the wages of sin is death (Romans 6:23), the law required that people performed rituals and sacrifices in order to please God and remain in His grace. The prophet Jeremiah predicted that there would be a time when God would make a new covenant with the nation of Israel.
 
Taken from
===> http://www.gotquestions.org/new-covenant.html
 
Happy Sabbath