ROM 11:16 For if the firstfruit be holy, so is the lump also: and if the root be holy, so are the branches.
ROM 11:17 And if some of the branches be broken, and thou, being a wild olive, art ingrafted in them, and art made partaker of the root, and of the fatness of the olive tree,
ROM 11:18 Boast not against the branches. But if thou boast, thou bearest not the root, but the root thee.
ROM 11:19 Thou wilt say then:
The branches were broken off, that I might be grafted in.
ROM 11:20
Well: because of unbelief they were broken off. But thou standest by faith:
be not highminded, but fear.
ROM 11:21 For if God hath not spared the natural branches, fear lest perhaps he also spare not thee.
ROM 11:22 See then the goodness and the severity of God: towards them indeed that are fallen, the severity; but towards thee, the goodness of God,
if thou abide in goodness, otherwise thou also shalt be cut off.
ROM 11:23
And they also, if they abide not still in unbelief, shall be grafted in: for God is able to graft them in again.
ROM 11:24 For if thou wert cut out of the wild olive tree, which is natural to thee; and, contrary to nature, were grafted into the good olive tree; how much more shall they that are the natural branches, be grafted into their own olive tree?
ROM 11:25 For I would not have you ignorant, brethren, of this
mystery, (lest you should be wise in your own conceits), that blindness in part has happened in Israel, until the fulness of the Gentiles should come in.
Emphasis mine.