That a new law was to be given
In Micah: “For the law shall go forth out of Sion, and the word of the Lord from Jerusalem. And He shall judge among many peoples, and He shall subdue and uncover strong nations.” Also in Isaiah: “For from Sion shall go forth the law, and the word of the Lord from Jerusalem; and He shall judge among the nations.” Likewise in the Gospel according to Matthew: “And behold a voice out of the cloud, saying, This is my beloved Son, in whom I am well pleased; hear Him.”
Source: The Treatises of Cyprian (New Advent)