Jeremiah 31:31-33

Behold, the days come, saith the Lord, that I will make a new covenant with the house of Israel, and with the house of Judah: Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt; which my covenant they brake, though I was an husband unto them saith the Lord, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people.