1 John 5:7

And it is the Spirit that beareth witness, because the Spirit is the truth.

For there are three that testify:

For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.

For there are three that testify:

For there are three that testify:

For there are three that bear witness in heaven: the Father, the Word, and the Holy Spirit; and these three are one.

So we have these three witnesses—

For there are three who testify: