NET
30 Now we know that you know everything and do not need anyone to ask you anything. Because of this we believe that you have come from God.”
Darby
30 Now we know that thou knowest all things, and hast not need that any one should demand of thee. By this we believe that thou art come from God.
KJV
30 Now are we sure that thou knowest all things, and needest not that any man should ask thee: by this we believe that thou camest forth from God.