Romans 11:23-25

23And they also, 1if they do not continue in their unbelief, will be grafted in, for God is able to graft them in again. 24For if you were cut off from what is by nature a wild olive tree, and were grafted contrary to nature into a cultivated olive tree, how much more will these who are the natural branches be grafted into their own olive tree?

25For 2I do not want you, brethren, to be uninformed of this 3mystery--so that you will not be 4wise in your own estimation--that a partial 5hardening has happened to Israel until the 6fullness of the Gentiles has come in;