“Then said the Jews, Forty and six years was this temple in building, and wilt thou rear it up in three days?”
King James Version (KJV)
2:20 Forty and six years - Just so many years before the time of this conversation, Herod the Great had begun his most magnificent reparation of the temple, (one part after another,) which he continued all his life, and which was now going on, and was continued thirty - six years longer, till within six or seven years of the destruction of the state, city, and temple by the Romans.
Joh 2:20 Forty and six years. It had been forty-six years since Herod the Great began the reconstruction of the temple, and it was not yet entirely completed. When Jesus was on trial before the Sanhedrin, these words were brought up as blasphemy.