Exodus

And thou shalt put the mercy seat above upon the ark; and in the ark thou shalt put the testimony that I shall give thee.

And he took and put the testimony into the ark, and set the staves on the ark, and put the mercy seat above upon the ark:

And the veil of the temple was rent in twain from the top to the bottom.

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

And the Lord said unto Moses, Speak unto Aaron thy brother, that he come not at all times into the holy place within the vail before the mercy seat, which is upon the ark; that he die not: for I will appear in the cloud upon the mercy seat.