Romans 11:31

even also these were now disobedient, in order that through the mercy shown to you they themselves may now also obtain mercy.

Romans 10:16

But they have not all heard the gospel. For Isaiah says, Lord, who has believed our report?

Romans 11:15

For if the casting away of them was the reconciling of the world, what will their reception be, but life from the dead?

Romans 11:25

I do not wish you to be ignorant, brethren, as to this mystery, in order that you may not he wise with yourselves, that blindness in part has happened unto Israel, until the fulness of the Gentiles may come in;

Treasury of Scripture Knowledge

Summary

Even so have these also now not believed, that through your mercy they also may obtain mercy.

Bible References

Believed

Romans 10:16
But they have not all heard the gospel. For Isaiah says, Lord, who has believed our report?
Romans 11:15
For if the casting away of them was the reconciling of the world, what will their reception be, but life from the dead?