'Testify Concerning' in the Bible
The same came for a testimony, that he might testify concerning the Light, that all might believe through him.
He was not the Light; but he came, that he might testify concerning the Light.
and had no need that any one should testify concerning man; for He Himself knew what was in man,
If I testify concerning Myself, My testimony is not true.
But I have a testimony greater than that of John; for the works which the Father hath given Me to accomplish, the very works that I am doing testify concerning Me, that the Father hath sent Me.
Ye search the Scriptures; because in them ye think ye have eternal life; and these are they that testify concerning Me;
The world cannot hate you; but Me it hates, because I testify concerning it, that its works are evil.
Jesus answered and said to them, "Even if I do testify concerning Myself, My testimony is true; because I know whence I came, and whither I go; but ye know not whence I came, or whither I go.
I am One Who testify concerning Myself; and the Father, Who sent Me, testifieth concerning Me."
Jesus answered them, "I told you, and ye did not believe: the works that I do in My Father's name, these testify concerning Me.
"When the Advocate shall come, Whom I will send to you from the Father, the Spirit of truth, Who proceedeth from the Father, He will testify concerning Me;
Jesus answered him, "If I spake evil, testify concerning the evil; but, if well, why do you beat Me?"