Bede

For what follows: "And I will establish My covenant with him for an everlasting covenant, and with his seed after him," etc. He says his seed in those who, by imitating the faith of Abraham, merit to hear from the Lord: "Blessed are you who weep now, for you shall laugh" (Luke 6:21); to such as these the Apostle, joining himself, says: "Now we, brethren, as Isaac was, are children of promise" (Galatians 4:28). …

Commentary on Genesis (Hexaemeron) ↗