"You are the Son of God." And he strongly admonished them, lest they make him known.
And he straitly charged them that they should not make him known.
And He charged them strictly and severely under penalty again and again that they should not make Him known.
And he charged them much that they should not make him known.
But he strictly ordered them not to reveal who he was.
Thou art the Son of God. And he strictly charged them that they should not make him known.