^{15 Ref} Brothers, as men would say, even a man's agreement, when it has been made certain, may not be put on one side, or have additions made to it.

^{16 Ref} Now to Abraham were the undertakings given, and to his seed. He says not, And to seeds, as of a great number; but as of one, he says, And to your seed, which is Christ.

^{17 Ref} Now this I say: The law, which came four hundred and thirty years after, does not put an end to the agreement made before by God, so as to make the undertaking without effect.