Romans 11:5-6 — Even so then at this present time also there is a remnant according to the election of grace.
And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then it is no more grace: otherwise work is no more work.
There were still some Jews saved by grace. Paul offers this as further evidence that God hasn’t forsaken the nation of Israel.
Grace is not grace if mixed with works. The two principles are mutually exclusive (Romans 4:4-5). Thus in salvation there is no “your part” to perform; it is the gift of God’s love, to be received in simple faith (Romans 6:23; Ephesians 2:8-9) — C.R. Stam, The Epistle of Paul to the Romans, page 266