John 19:35

And he that saw it bare record, and his record is true: and he knoweth that he saith true, that ye might believe.

He who has seen has testified, and his testimony is true. He knows that he tells the truth, that you may believe.

And he that hath seen hath borne witness, and his witness is true: and he knoweth that he saith true, that ye also may believe.

and he who hath seen hath testified, and his testimony is true, and that one hath known that true things he speaketh, that ye also may believe.

The one who saw it has testified to this, and his testimony is true. He knows that he is telling the truth, so that you also may believe.