'Mercy seat' in the Bible

and Jehovah said to Moses, Speak to Aaron your brother, that he does not come at all times into the sanctuary within the veil before the mercy-seat, which is on the Ark, so that he will not die. For I will appear in the cloud on the mercy-seat.

And he shall put the incense on the fire before Jehovah. And the cloud of the incense shall cover the mercy-seat that is on the Testimony. And he shall not die.

And he shall take of the blood of the young bull and shall sprinkle with his finger on the front of the mercy-seat eastward. And he shall sprinkle at the front of the mercy-seat seven times from the blood with his finger.

Then he shall kill the goat of the sin offering that is for the people, and bring its blood inside the veil. And he shall do with that blood as he did with the blood of the young bull, and sprinkle it on the mercy-seat and before the mercy-seat.