1 John 5:7-9

Amplified Bible, Classic Edition

⁷ So there are three witnesses ^[a]in heaven: the Father, the Word and the Holy Spirit, and these three are One;

⁸ and there are three witnesses on the earth: the Spirit, the water, and the blood; and these three agree [are in unison; their testimony coincides].

⁹ If we accept [as we do] the testimony of men [if we are willing to take human authority], the testimony of God is greater (of stronger authority), for this is the testimony of God, even the witness which He has borne regarding His Son.