1 John 5:6-9

And 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. So we have these three witnesses— the Spirit, the water, and the blood—and all three agree. Since we believe human testimony, surely we can believe the greater testimony that comes from God. And God has testified about his Son.