Galatians 3:18-19

18If we have to gain the inheritance by following those laws, then it no longer comes to us because of the promise. However, God freely gave the inheritance to Abraham through a promise.

19What, then, is the purpose of the laws given to Moses? They were added to identify what wrongdoing is. Moses’ laws did this until the descendant to whom the promise was given came. It was put into effect through angels, using a mediator.