The Church is the body of Christ and those people are the followers/children of Jesus.

Ephesians 1:22-23 (KJV)

And hath put all things under his feet, and gave him to be the head over all things to the church, Which is his body, the fulness of him that filleth all in all.

Ephesians 2:19-22 (KJV)

19Now therefore ye are no more strangers and foreigners, but fellowcitizens with the saints, and of the household of God;

20And are built upon the foundation of the apostles and prophets, Jesus Christ himself being the chief corner stone;

21In whom all the building fitly framed together groweth unto an holy temple in the Lord:

22In whom ye also are builded together for an habitation of God through the Spirit.

1 Corinthians 12:13 (KJV)

For by one Spirit are we all baptized into one body, whether we be Jews or Gentiles, whether we be bond or free; and have been all made to drink into one Spirit.

Romans 8:14 (KJV)

For as many as are led by the Spirit of God, they are the sons of God.

1 John 3:10 (KJV)

In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother.