Hebrews 9:7 (KJV)

And over it the cherubims of glory shadowing the mercyseat; of which we cannot now speak particularly.

Now when these things were thus ordained, the priests went always into the first tabernacle, accomplishing the service of God.

But into the second went the high priest alone once every year, not without blood, which he offered for himself, and for the errors of the people:

The Holy Ghost this signifying, that the way into the holiest of all was not yet made manifest, while as the first tabernacle was yet standing:

Which was a figure for the time then present, in which were offered both gifts and sacrifices, that could not make him that did the service perfect, as pertaining to the conscience;