And the scripture, foreseeing that God would justify the Gentiles through faith, preached before the gospel unto Abraham, saying,
In you shall all nations be blessed.
All Commentaries on Galatians 3:8 Go To Galatians 3
Augustine of Hippo
AD 430
The greatest cause for triumph in Abraham was that, before his circumcision, faith was reckoned to him for righteousness. This is most correctly referred to the promise that “All nations shall be blessed in you,” meaning of course by the following of his faith, by which he was justified even before the ordinance of circumcision, which he received as a token of faith, and long before the servitude of the law, which was given much later.