Hebrews 10:16
This is the covenant that I will make with them after those days, saith the Lord, I will put my laws into their hearts, and in their minds will I write them;
More from Hebrews 10
For the law having a shadow of good things to come, and not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect.
For then would they not have ceased to be offered? because that the worshippers once purged should have had no more conscience of sins.
But in those sacrifices there is a remembrance again made of sins every year.
For it is not possible that the blood of bulls and of goats should take away sins.
Wherefore when he cometh into the world, he saith, Sacrifice and offering thou wouldest not, but a body hast thou prepared me: