Bible Verses About Church of Israel: A spiritual church within it

Not as though the word of God hath miscarried. For all are not Israelites that are of Israel.

Neither are all they that are the seed of Abraham, children: but in Isaac shall thy seed be called.

That is to say, not they that are the children of the flesh are the children of God: but they that are the children of the promise are accounted for the seed.

God hath not cast away his people which he foreknew. Know you not what the scripture saith of Elias, how he calleth on God against Israel?

Lord, they have slain thy prophets, they have dug down thy altars. And I am left alone: and they seek my life.

But what saith the divine answer to him? I have left me seven thousand men that have not bowed their knees to Baal.

Even so then, at this present time also, there is a remnant saved according to the election of grace.

And if by grace, it is not now by works: otherwise grace is no more grace.

What then? That which Israel sought, he hath not obtained: but the election hath obtained it. And the rest have been blinded.