Galatians 3:17-19

17What I am saying is this: the Law, which came 1four hundred and thirty years later, does not invalidate a covenant previously ratified by God, so as to nullify the promise. 18For 2if the inheritance is 3based on law, it is no longer 4based on a promise; but 5God has granted it to Abraham by means of a promise.

196Why the Law then? It was added 7because of transgressions, having been 8ordained through angels 9by the 10agency of a mediator, until 11the seed would come to whom the promise had been made.