'In Christ' in the Bible

but I was unknown {in person} to the churches of Judea [that are] in Christ,

Now [this was] because of the false brothers secretly brought in, who slipped in to spy out our freedom that we have in Christ Jesus, in order that they might enslave us,

but knowing that a person is not justified by the works of the law, if not by faith in Jesus Christ, and we have believed in Christ Jesus so that we may be justified by faith in Christ and not by the works of the law, because by the works of the law {no human being will be justified}.

in order that the blessing of Abraham might come to the Gentiles in Christ Jesus, so that we might receive the promise of the Spirit through faith.

For you are all sons of God through faith in Christ Jesus,

There is neither Jew nor Greek, there is neither slave nor free, there is neither male and female, for you are all one in Christ Jesus.

For in Christ Jesus neither circumcision counts for anything nor uncircumcision, but faith working through love.