Romans 11:31

even so did these now disobey, that by the mercy shown to you they also may obtain mercy.

Romans 10:16

But they did not all obey the glad tidings. For Isaiah says, "Lord, who believed our report?"

Romans 11:15

For, if the casting away of them is the reconciling of the world, what will the receiving of them be, but life from the dead?

Romans 11:25

For I do not wish you, brethren, to be ignorant of this mystery (lest ye be wise in your own conceits), that a hardening, in part, has befallen Israel, until the fulness of the gentiles 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 did not all obey the glad tidings. For Isaiah says, "Lord, who believed our report?"
Romans 11:15
For, if the casting away of them is the reconciling of the world, what will the receiving of them be, but life from the dead?