'Mercy seat' in the Bible

and Jehovah said to Moses, Speak unto Aaron thy brother, that he come not at all times into the sanctuary inside the veil before the mercy-seat which is upon the ark, that he die not; for I will appear in the cloud upon the mercy-seat.

And he shall put the incense upon the fire before Jehovah, that the cloud of the incense may cover the mercy-seat which is upon the testimony, that he die not.

And he shall take of the blood of the bullock, and sprinkle with his finger upon the front of the mercy-seat eastward; and before the mercy-seat shall he sprinkle of the blood seven times with his finger.

And he shall slaughter the goat of the sin-offering, which is for the people, and bring its blood inside the veil, and do with its blood as he did with the blood of the bullock, and sprinkle it upon the mercy-seat, and before the mercy-seat;