1 John 5:6
"This is he that came by water and blood, even Jesus Christ; not by water only, but by water and blood. And it is the Spirit that beareth witness, because the Spirit is truth."1 John 5:6 (KJV)
Context from 1 John 5
4
For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, even our faith.
5
Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?
6
This is he that came by water and blood, even Jesus Christ; not by water only, but by water and blood. And it is the Spirit that beareth witness, because the Spirit is truth.
7
For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.
8
And there are three that bear witness in earth, the Spirit, and the water, and the blood: and these three agree in one.