I sent this and realized the cite was incorrect as I inadvertently took off the 1 in the book. It is actually 1 John 5:6. My apologies.
John 5:6 (NLT)
6And Jesus Christ was revealed as God’s Son by his baptism in water and by shedding his blood on the cross—not by water only, but by water and blood. And the Spirit, who is truth, confirms it with his testimony.