1 Jn 5:5-8
Who (indeed) is the victor over the world but the one who believes that Jesus is the Son of God? This is the one who came through water and blood, Jesus Christ, not by water alone, but by water and blood. The Spirit is the one that testifies, and the Spirit is truth. So there are three that testify, the Spirit, the water, and the blood, and the three are of one accord.