Romans 11:18 (KJV)

For I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office:

If by any means I may provoke to emulation them which are my flesh, and might save some of them.

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

For if the firstfruit be holy, the lump is also holy: and if the root be holy, so are the branches.

And if some of the branches be broken off, and thou, being a wild olive tree, wert graffed in among them, and with them partakest of the root and fatness of the olive tree;

Thou wilt say then, The branches were broken off, that I might be graffed in.

Well; because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear:

For if God spared not the natural branches, take heed lest he also spare not thee.

Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off.

And they also, if they abide not still in unbelief, shall be graffed in: for God is able to graff them in again.