But I have greater witness than that of John: for the works which the Father hath given Me to finish, the same works that I do, bear witness of Me, that the Father hath sent Me. And the Father Himself, which hath sent Me, hath borne witness of Me. Ye have neither heard His voice at any time, nor seen His shape. And ye have not His word abiding in you: for whom He hath sent, Him ye believe not. Search the Scriptures; for in them ye think ye have eternal life: and they are they which testify of Me. And ye will not come to Me, that ye might have life. I receive not honour from men.
John 5:36-40
testify of Me
The One who Testifies of Jesus
“If I had not come and spoken unto them, they had not had sin: but now they have no cloke for their sin.
He that hateth Me hateth My Father also. If I had not done among them the works which none other man did, they had not had sin: but now have they both seen and hated both Me and My Father. But this cometh to pass, that the word might be fulfilled that is written in their law, ‘They hated Me without a cause.’ But when the Comforter is come, whom I will send unto you from the Father, the Spirit of truth, which proceedeth from the Father, He shall testify of Me: and ye also shall bear witness, because ye have been with Me from the beginning.” John 15:22-27
The Fire and Hammer 