Hebrews 9:5

and above the chest were the winged creatures, the symbols of God's glorious presence, overshadowing the mercy seat, of which I cannot now speak in detail.

Hebrews 9:8

By this the Holy Spirit was showing that there was as yet no access to the real sanctuary while the outer tent was still in existence,

Treasury of Scripture Knowledge

Summary

The ark of the testimony, and the staves thereof, and the mercy seat,

The mercy seat

Bible References

The mercy seat

Hebrews 9:5
and above the chest were the winged creatures, the symbols of God's glorious presence, overshadowing the mercy seat, of which I cannot now speak in detail.