Galatians 3:15-17 New Revised Standard Version, Anglicised (NRSVA)
The Promise to Abraham
15 Brothers and sisters,[a] I give an example from daily life: once a person’s will[b] has been ratified, no one adds to it or annuls it. 16 Now the promises were made to Abraham and to his offspring;[c] it does not say, ‘And to offsprings’,[d] as of many; but it says, ‘And to your offspring’,[e] that is, to one person, who is Christ. 17 My point is this: the law, which came four hundred and thirty years later, does not annul a covenant previously ratified by God, so as to nullify the promise.
Galatians 3:15-17 New International Version (NIV)
The Law and the Promise
15 Brothers and sisters, let me take an example from everyday life. Just as no one can set aside or add to a human covenant that has been duly established, so it is in this case. 16 The promises were spoken to Abraham and to his seed. Scripture does not say “and to seeds,” meaning many people, but “and to your seed,”[a] meaning one person, who is Christ. 17 What I mean is this: The law, introduced 430 years later, does not set aside the covenant previously established by God and thus do away with the promise.