In Jeremiah 31, the Lord says he is going to make a new covenant with his people. It will not be like the old one in that it won't be written on Stone Tablets like the Ten Commandments or relating how to cleanse sins as explained in Leviticus. All people will come to know the Lord, not just the Jews or a particular nation, but all people will come to know the Lord. At that time the Lord will write the law on their hearts. He states that our sins will be remembered no more.