'In Christ' in the Bible

And I was unknown by face to the churches of Judea which were in Christ.

and not sinners of the Gentiles, Even we (knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ) have believed in Christ Jesus, that we might be justified by the faith of Christ, and not by the works of the law; because by the works of the law no flesh shall be justified.

There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female; for ye are all one in Christ Jesus.

For in Christ Jesus neither circumcision availeth any thing, nor uncircumcision, but faith which worketh by love.

For in Christ Jesus neither circumcision is any thing, nor uncircumcision, but a new creation.