Which things are an allegory: for these are the two covenants; the one from mount Sinai, which brings forth to bondage, which is Hagar.
All Commentaries on Galatians 4:24 Go To Galatians 4
Augustine of Hippo
AD 430
Under the sure guidance of the apostle we see how clearly he shows that these two are to be taken allegorically. One may also consider the sons of Keturah under some figure of things to come. The fact that such people did these things is recorded not without purpose but under the guidance of the Holy Spirit. We will perhaps find that heresies and schisms are signified in this allegory. For these are sons of the free woman, that is, of the church, and yet they again revert to life according to the flesh, not spiritually according to a promise.