Galatians 3:17-19

New Revised Standard Version Catholic Edition

¹⁷ My point is this: the law, which came four hundred thirty years later, does not annul a covenant previously ratified by God, so as to nullify the promise. ¹⁸ For if the inheritance comes from the law, it no longer comes from the promise; but God granted it to Abraham through the promise.

The Purpose of the Law

¹⁹ Why then the law? It was added because of transgressions, until the offspring^[a] would come to whom the promise had been made; and it was ordained through angels by a mediator.