And herein is a solemn prefiguration of the implanting of believers of all nations into the covenant and faith of Abraham; for this name he received upon the solemn establishment of the covenant with him, as the apostle explains the place, Rom. 4:11–17. All, then, that believe are taken into the covenant of Abraham; and as unto the privileges of it, and inheritance to be obtained by it, they are no less his children and heirs than those who proceeded from his loins according to the flesh; as hath been manifested in our Exercitation concerning the oneness of the church. And herein also God manifested what was his design in his call and separation unto himself, even to make and constitute him and his posterity the means of bringing forth the promised Seed, wherein all nations were to be blessed.
John Owen, An Exposition of the Epistle to the Hebrews, 1.450.