Jesus said “For truly, I say to you, until heaven and earth pass away, not an iota, not a dot, will pass from the Law until all is accomplished.” Matt. 5:18
This was not a reference to something in our future, but it was a reference to the passing away of the Old Covenant Israel and everything associated with it, which happened in AD 70.
Pastor Paul White gives an outstanding exposition of the Old Testament verses which expound on this point. Listen and Learn.