Jesus’ new covenant is not only a revision of the Abrahamic covenant but also an incorporation of a new body of people. This new covenant is said to be for all who believe in Jesus–not only believing Jews but also believing Gentiles. Once again, we see how the idea of a biblical covenant is presented as holding together the particular(Jesus) And Universal (blessing to the nations; cf., Genesis 12:2–3). In this way, the New Testament presents the new covenant of Jesus as the ultimate expansion of the Abrahamic covenant.
–Jonathan Burnside, God, Justice, and Society: Aspects of Law and Legality in the Bible (Oxford: Oxford University press, 2011), 62.