What purpose then does the law serve? It was added because of transgressions, till the Seed should come to whom the promise was made; and it was appointed through angels by the hand of a mediator.
Galatians 3:19
Surrounding context
3:18 For if the inheritance is of the law, it is no longer of promise; but God gave it to Abraham by promise.
3:19 What purpose then does the law serve? It was added because of transgressions, till the Seed should come to whom the promise was made; and it was appointed through angels by the hand of a mediator.
3:20 Now a mediator does not mediate for one only, but God is one.