a human body is formed by God, each believer is 'put into' (baptized) Christ's body by one Spirit (Holy Spirit).
1 Corinthians 12:12-13 KJV
For as the body is one, and hath many members, and all the members of that one body, being many, are one body: so also is Christ...
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.
And this body is a NEW MAN, made up of Jews and Gentiles, reconciled to peace by the cross...
Ephesians 2:15-16 KJV
Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace; [16] And that he might reconcile both unto God in one body by the cross...
having slain the enmity thereby:
..of which Christ Jesus is the HEAD, and this body declared to be the CHURCH
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, [23] Which is his body,...
the fulness of him that filleth all in all.
You will not find the doctrine of the BODY OF CHRIST mentioned in the law and prophets, nor in the four gospels, nor in the writings of Peter, James, and John, as it was a revelation given to Paul. The BODY OF CHRIST is united,...
cared for, and served by and for one another through ministry, and edified for its growth unto maturity.
Ephesians 4:12 KJV
For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ:....
And all things prior, that is the law/prophets, ordinances, dietary laws, holy days, were all pointers to what would come, beings only shadows of this BODY OF CHRIST, which was formed solely through the work of Christ.
Colossians 2:13-17 KJV
And you, being dead in your sins...
and the uncircumcision of your flesh, hath he quickened together with him, having forgiven you all trespasses; [14] Blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to his cross;...
15] And having spoiled principalities and powers, he made a shew of them openly, triumphing over them in it. [16] Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days:...
[17] Which are a shadow of things to come; but the body is of Christ.