'Children' in the Bible

The Spirit itself beareth witness with our spirit, that we are the children of God:

And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together.

Because the creature itself also shall be delivered from the bondage of corruption into the glorious liberty of the children of God.

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

That is, They which are the children of the flesh, these are not the children of God: but the children of the promise are counted for the seed.

(For the children being not yet born, neither having done any good or evil, that the purpose of God according to election might stand, not of works, but of him that calleth;)

And it shall come to pass, that in the place where it was said unto them, Ye are not my people; there shall they be called the children of the living God.

Esaias also crieth concerning Israel, Though the number of the children of Israel be as the sand of the sea, a remnant shall be saved: