1 John 5:5-8

Now who is the person who has conquered the world except the one who believes that Jesus is the Son of God? Jesus Christ is the one who came by water and blood – not by the water only, but by the water and the blood. And the Spirit is the one who testifies, because the Spirit is the truth. For there are three that testify, the Spirit and the water and the blood, and these three are in agreement.