'Mercy seat' in the Bible

and LORD said to Moses, Speak to Aaron thy brother, that he not come at all times into the holy place within the veil, before the mercy-seat which is upon the ark, that he not die, for I will appear in the cloud upon the mercy-seat

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

And he shall take of the blood of the bullock, and sprinkle it with his finger upon the mercy-seat on the east. And he shall sprinkle of the blood with his finger seven times before the mercy-seat.

Then he shall kill the goat of the sin-offering, that is for the people, and bring his blood within the veil, and do with his blood as he did with the blood of the bullock, and sprinkle it upon the mercy-seat, and before the mercy-