This is deep stuff!

1 John 5:7 For there are three that bear witness in heaven: the Father, the Word, and the Holy Spirit; and these three are one. 8 And there are three that bear witness on earth:[b] the Spirit, the water, and the blood; and these three agree as one.

Witness in heaven-The Word, the Holy Spirit, and the Father

Witness on earth-The Spirit, the water and the blood