King James Version
And he that saw it bare record, and his record is true: and he knoweth that he saith true, that ye might believe.English Standard Version
He who saw it has borne witness--his testimony is true, and he knows that he is telling the truth--that you also may believe.Catholic Public Domain Version
And he who saw this has offered testimony, and his testimony is true. And he knows that he speaks the truth, so that you also may believe