4:24 Which things are an allegory: for {z} these are the {a} two covenants; the one from the mount {b} Sinai, which gendereth to bondage, which is Agar.
(z) These represent and symbolize.
(a) They are called two covenants, one of the Old Testament, and another of the New: which were not two indeed, but in respect of the times, and the diversity of the manner of ruling.
(b) He makes mention of Sinai, because that covenant was made in that mountain, of which mountain Hagar was a symbol.
4:24 Which things are an allegory. Though literally true, the facts had an allegorical interpretation. The two women and their children were types.
For these are the two covenants. One, the bondwoman, represents the covenant given at Sinai, the covenant of bondage. The other, the freewoman, represents the covenant of Christ, the gospel.
4:24 Which things are an allegory - An allegory is a figurative speech, wherein one thing is expressed, and another intended. For those two sons are types of the two covenants. One covenant is that given from mount Sinai, which beareth children to bondage - That is, all who are under this, the Jewish covenant, are in bondage. Which covenant is typified by Agar.
4:21-27 The difference between believers who rested in Christ only, and those who trusted in the law, is explained by the histories of Isaac and Ishmael. These things are an allegory, wherein, beside the literal and historical sense of the words, the Spirit of God points out something further. Hagar and Sarah were apt emblems of the two different dispensations of the covenant. The heavenly Jerusalem, the true church from above, represented by Sarah, is in a state of freedom, and is the mother of all believers, who are born of the Holy Spirit. They were by regeneration and true faith, made a part of the true seed of Abraham, according to the promise made to him.