The mate of every prophecy is its fulfillment. God's Word finds its mate in fulfilled Bible prophecy, and the ones which have already occurred and been fulfilled, foretold hundreds of years in advance, have been fulfilled. Every prophecy the Bible has uttered has been fulfilled except the ones that are yet to come, and they'll be fulfilled just as surely as the ones that have been fulfilled in the past.
A More Sure Word of Prophecy (2 Peter 1:19)