The verse in Hebrews are described in Jeremiah do refer to the new covenant yes but its so much more they also refer to the second coming as does Ez. this is talking about the second coming the millenium. I was trying show you that the second coming is also talked about in the O.T. That there are many unfulfilled prophecies in O.T. The Law is has NEVER been replaced. You must often go to the O.T, to get the type or full explanation for what is being said in the N.T. you must understand them both at times the only way to get a full explanation of whats being said in the N.T. is to go to the O.T.its not just all words that no longer apply.There are many things in the O.T. that are about the second coming you cant just assume because its the O.T. it is about the first coming.Isa, Ez, Dan,Joel, just to name a few are all about our time and the futurejust because we under grace now doesn't void the New Testament