Strong's G2435 ἱλαστήριον (hilasterion)

And thou shalt make a propitiatory, a lid of pure gold; the length of two cubits and a half, and the breadth of a cubit and a half.

And thou shalt make two cherubs graven in gold, and thou shalt put them on both sides of the propitiatory.

They shall be made, one cherub on this side, and another cherub on the other side of the propitiatory; and thou shalt make the two cherubs on the two sides.

The cherubs shall stretch forth their wings above, overshadowing the propitiatory with their wings; and their faces shall be toward each other, the faces of the cherubs shall be toward the propitiatory.

And thou shalt set the propitiatory on the ark above, and thou shalt put into the ark the testimonies which I shall give thee.

And I will make myself known to thee from thence, and I will speak to thee above the propitiatory between the two cherubs, which are upon the ark of testimony, even in all things which I shall charge thee concerning the children of Israel.

the tabernacle of witness, and the ark of the covenant, and the propitiatory that is upon it, and the furniture of the tabernacle,

And he made the propitiatory over the ark of pure gold,

one cherub on the one end of the propitiatory, and another cherub on the other end of the propitiatory,

overshadowing the propitiatory with their wings.

And the Lord said to Moses, Speak to Aaron thy brother, and let him not come in at all times into the holy place within the veil before the propitiatory, which is upon the ark of the testimony, and he shall not die; for I will appear in a cloud on the propitiatory.

And he shall put the incense on the fire before the Lord, and the smoke of the incense shall cover the mercy seat over the tables of testimony, and he shall not die.

And he shall take of the blood of the calf, and sprinkle with his finger on the mercy seat eastward: before the mercy seat shall he sprinkle seven times of the blood with his finger.

And he shall kill the goat for the sin offering that is for the people, before the Lord; and he shall bring in of its blood within the veil, and shall do with its blood as he did with the blood of the calf, and shall sprinkle its blood on the mercy seat, in front of the mercy seat.

When Moses went into the tabernacle of witness to speak to God, then he heard the voice of the Lord speaking to him from off the mercy seat, which is upon the ark of the testimony, between the two cherubs; and he spoke to him.

from the bottom at the commencement of the hollow part to this great mercy seat, from beneath was two cubits, and the breadth was a cubit; and from the little mercy seat to the great mercy seat, four cubits, and the breadth was a cubit.

And the mercy seat shall be fourteen cubits in length, by fourteen cubits in breadth on its four sides; and there shall be a border to it carried round about it of half a cubit; and the rim of it shall be a cubit round about; and the steps thereof looking eastward.

And they shall take of its blood, and shall put it on the four horns of the altar, and upon the four corners of the propitiatory, and upon the base round about, and they shall make atonement for it.

I saw the Lord standing on the altar: and he said, Smite the mercy seat, and the porch shall be shaken: and cut through into the heads of all; and I will slay the remnant of them with the sword: no one of them fleeing shall escape, and no one of them striving to save himself shall be delivered.

Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;

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

For they became the atonement to the sin of the nation; and the Divine Providence saved Israel, aforetime afflicted, by the blood of those pious ones, and their propitiatory death.