John 16:30 in the King James Version
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.
Context
29 His disciples said to him, “Behold, now you are speaking plainly, and using no figures of speech.
30 Now we know that you know all things, and don’t need for anyone to question you. By this we believe that you came from God.”
31 Jesus answered them, “Do you now believe?