Romans 11:31

so also they now have disobeyed that they may obtain mercy by your mercy.

Romans 10:16

But all did not obey the gospel; for Isaiah says, Lord, who believed our report?

Romans 11:15

For if their falling away is the reconciling of the world, what will their recovery be but life from the dead?

Romans 11:25

For I wish you not to be ignorant, brothers, of this mystery; that you may not be wise in your own conceit. For hardness in part has come upon Israel, till the fullness of the gentiles shall 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 all did not obey the gospel; for Isaiah says, Lord, who believed our report?
Romans 11:15
For if their falling away is the reconciling of the world, what will their recovery be but life from the dead?