'Have Fellowship With' in the Bible

What we have seen and heard we declare to you so that you, too, can have fellowship with us. Now this fellowship of ours is with the Father and with his Son, Jesus, the Messiah.

If we claim that we have fellowship with him but keep living in darkness, we are lying and not practicing the truth.

But if we keep living in the light as he himself is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin.