ISB ~ Hebrews 8 v13

ready to vanish:This is the strongest hint in Hebrews that the sanctuary (Jerusalem Temple) and apparatus (Levitical cult and priesthood) of the Old Covenant were still operating when the letter was written. Other passages, such as 8:4-5 and 10:1-3, give the same impression. The overall perspective of the letter confirms this, as well: it is inconceivable that readers would be tempted to revert to the system of Levitical worship after the Temple and priestly leadership of Jerusalem were destroyed by the Romans in A.D. 70.

See introduction to Hebrews:Date.