The Father and Jesus are one and the Spirit of The Lord it says goes out from the Father ! On Earth the spirit the water and the blood agree !
1 John 5:7-9 (New King James Version)
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: the Spirit, the water, and the blood; and these three agree as one.
9 If we receive the witness of men, the witness of God is greater; for this is the witness of God which He has testified of His Son.