The cup of blessing which we bless, is it not the communion of the blood of Christ? The bread which we break, is it not the communion of the body of Christ?
Now on the first day of the week, the disciples being assembled to break bread, Paul was discussing with them, being about to leave on the next day, and extended his message until midnight.
that which we have seen and heard we declare to you, in order that you also may have fellowship with us; and indeed our fellowship is with the Father and with His Son Jesus Christ.
But if we are walking in the light, as He is in the light, we have fellowship with one another, and the blood of Jesus Christ His Son cleanses us from all sin.