John Calvin on Hebrews 9:10

10. Until the time of reformation, etc. Here he alludes to the prophecy of Jeremiah. (Jeremiah 31:31.) Although the original text in the book refers to Jer 31:37, which warns of an ultimate rejection of Israel; it would seem that Jer 31:31 is more appropriate in the current context of reformation. — fj. The new covenant succeeded the old as a reformation. He expressly mentions meats and drinks, and other things of minor importance, because by these trifling observances a more certain opinion may be formed how far short was the Law of the perfection of the Gospel. See Appendix G 2.