Why? Because they sought it not by faith, but as it were by the works of the law. For they stumbled at that stumbling stone;
All Commentaries on Romans 9:32 Go To Romans 9
Ambrosiaster
AD 400
The Jews rejected faith, which as I have said is the fulfillment of the law, and instead claimed that they were justified by works, that is, by the sabbath, the new moons, circumcision and so on. They forgot that Scripture says that “the just shall live by faith.” Commentary on Paul’s Epistles.