Romans 11:23-25

23And they also, if they continue not in their unbelief, shall be grafted in: for God is able to graft them in again.

24For if thou wast cut out of that which is by nature a wild olive tree, and wast grafted contrary to nature into a good olive tree: how much more shall these, which are the natural branches, be grafted into their own olive tree?

25For I would not, brethren, have you ignorant of this mystery, lest ye be wise in your own conceits, that a hardening in part hath befallen Israel, until the fulness of the Gentiles be come in;