MLV(i)
15 Brethren, I am speaking according to the manner of man, even a man’s covenant when it has been validated, no one nullifies or alters it with provisions.
16 Now the promises were spoken to Abraham and to his seed. He did not say and to seeds, as upon many, but as upon one and ‘to your seed,’which is the Christ.
17 Now I am saying this: the law, having happened four hundred and thirty years after ward, is not invalidating the covenant that has been validated beforehand by God in reference to Christ, that it should do-away-with the promise.