“Jesus answered and said unto them, Destroy this temple, and in three days I will raise it up.”
King James Version (KJV)
2:19 This temple - Doubtless pointing, while he spoke, to his body, the temple and habitation of the Godhead.
Joh 2:19-22 Destroy this temple. His own body. The sign that he would give the Jewish nation was his Resurrection. The Jews did not understand him, nor his own disciples, until after he rose from the dead (Mt 26:60,61 Mr 14:58).