1 John 5:8-10

New Catholic Bible

⁸ the Spirit, the water, and the blood,
and these three are as one.^[a]
9 If we accept human testimony,
the testimony of God is greater.
For it is the testimony of God,
the testimony that he has given about his Son.
¹⁰ Whoever believes in the Son of God
has this testimony in himself,
but those who do not believe in God
have made him out to be a liar
by refusing to believe the testimony
that God has given about his Son.