Mercy-Seat: Placed on the Ark of the Testimony

Put the mercy seat on the ark of the Testimony in the Most Holy Place.

Place the altar in front of the veil that is before the ark of the Testimony—before the mercy seat that is over the Testimony—where I will meet with you.

…the Tent of Meeting, the ark of the Testimony and the mercy seat upon it, and all the other furnishings of the tent—

Moses took the Testimony and placed it in the ark, attaching the poles to the ark; and he set the mercy seat atop the ark.

Above the ark were the cherubim of glory, overshadowing the mercy seat. But we cannot discuss these things in detail now.