1 John 5:7-10

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. All who believe in the Son of God know in their hearts that this testimony is true. Those who don’t believe this are actually calling God a liar because they don’t believe what God has testified about his Son.