God, Jesus & the Holy Spirit
The Spirit of truth proceeds from the Father and testifies about Jesus.
Cited Scripture
John 15:26.
Read Cited Scripture (KJV) John 15:26
King James Version
John 15:26
26But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceedeth from the Father, he shall testify of me:
Scripture quotations are from the King James Version (KJV).