Galatians 3:15-17 New Matthew Bible (NMB)
15 Brethren, I will speak with reference to the custom of men. Though it be but a man’s last will and testament, yet no one sets it aside or adds anything to it once it is confirmed. 16 To Abraham and his seed were the promises made. He does not say, In the seeds, as in many, but, In your seed, as in one, which is Christ. 17 This I say: the law, which began afterwards (over 430 years), does not nullify the testament that was confirmed before by God in Christ, so as to make the promise of no effect.