This Bible contradiction is from the Skeptic's Annotated Bible.
John 13:36 View context
Simon Peter said unto him, Lord, whither goest thou? Jesus answered him, Whither I go, thou canst not follow me now; but thou shalt follow me afterwards.
John 16:5 View context
But now I go my way to him that sent me; and none of you asketh me, Whither goest thou?