'Grafted' in the Bible

Now if some of the branches were broken off, and you, though a wild olive branch, were grafted in among them and have come to share in the rich root of the cultivated olive tree,

Then you will say, “Branches were broken off so that I might be grafted in.”

And even they, if they do not remain in unbelief, will be grafted in, because God has the power to graft them in again.

For if you were cut off from your native wild olive and against nature were grafted into a cultivated olive tree, how much more will these—the natural branches—be grafted into their own olive tree?