Everything that Jesus made known to people he had drawn from the teaching of the Law and Prophets, everything from the first Ten Commandments to Kosher Law to Ritual sacrifice.
What Jesus did, what no one else had done, what no other man in heaven on the earth or under the earth (except the messiah) could do, is reveal the hidden teaching and wisdom of God in giving the law, by showing the intelligent that the words used in the written law are figurative, the subjects hidden and not necessarily directly connected to the literal meaning of the words used. A revelation that God spoke through Moses, a prophet, in the same way that He spoke through all the prophets from Adam to Zechariah, in metaphor and allegory.
What was never written down, before and after Jesus, is the meaning of the figurative words.
"I will put my words into his mouth and he shall convey all of my commands." Deut. 18:18