Jeremiah 31:27-34 - Promise of a new covenant
31:27 The days are 
surely coming, says the LORD, when I will sow the house of Israel and 
the house of Judah with the seed of humans and the seed of animals.
31:28 And
 just as I have watched over them to pluck up and break down, to 
overthrow, destroy, and bring evil, so I will watch over them to build 
and to plant, says the LORD.
31:29 In those days they shall no longer say: "The parents have eaten sour grapes, and the children's teeth are set on edge."
31:30 But all shall die for their own sins; the teeth of the one who eats sour grapes shall be set on edge.
31:31 The days are surely coming, says the LORD, when I will make a new covenant with the house of Israel and the house of Judah.\31:32It
 will not be like the covenant that I made with their ancestors when I 
took them by the hand to bring them out of the land of Egypt--a covenant
 that they broke, though I was their husband, says the LORD.
31:33 But
 this is the covenant that I will make with the house of Israel after 
those days, says the LORD: I will put my law within them, and I will 
write it on their hearts, and I will be their God, and they shall be my 
people.
31:34 No longer shall they teach one another or say to 
each other, "Know the LORD," for they shall all know me, from the least 
of them to the greatest, says the LORD, for I will forgive their 
iniquity and remember their sin no more.