Why then the law? It was added because of transgressions, till the descendant should come to whom the promise was made; and it was ordained by angels in the hand of a mediator.
All Commentaries on Galatians 3:19 Go To Galatians 3
Irenaeus of Lyons
AD 202
It was added, until the seed should come to whom the promise was made; .
This is the seed of which the apostle says in the Epistle to the Galatians, "that the law of works was established until the seed should come to whom the promise was made."