'Fellowship' in the Bible

even when we were [spiritually] dead and separated from Him because of our sins, He made us [spiritually] alive together with Christ (for by His grace—His undeserved favor and mercy—you have been saved from God’s judgment).

In Him [and in fellowship with one another] you also are being built together into a dwelling place of God in the Spirit.

And to make all men see what is the fellowship of the mystery, which from the beginning of the world hath been hid in God, who created all things by Jesus Christ:

And have no fellowship with the unfruitful works of darkness, but rather reprove them.