'Have Fellowship With' in the Bible

that which we have seen and heard we declare unto you, so that you also may have fellowship with us. And truly our fellowship is with the Father and with His Son Jesus Christ.

If we say that we have fellowship with Him and walk in darkness, we lie and do not practice the truth.

But if we walk 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.