Romans 11:6-7

11:6 And if it is by grace, it is no longer by works, otherwise grace would no longer be grace. 11:7 What then? Israel failed to obtain what it was diligently seeking, but the elect obtained it. The rest were hardened,

Romans 9:27

9:27 And Isaiah cries out on behalf of Israel, “Though the number of the children of Israel are as the sand of the sea, only the remnant will be saved,