John 19:35

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

Other versions

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.

New International Version

The man who saw it has given testimony, and his testimony is true. He knows that he tells the truth, and he testifies so that you also may believe.