Leviticus 16:9-13

Then Aaron shall offer the goat on which the lot for the Lord fell, and make it a sin offering.

But the goat on which the lot for the scapegoat fell shall be presented alive before the Lord, to make atonement upon it, to send it into the wilderness as the scapegoat.

“Then Aaron shall offer the bull of the sin offering which is for himself and make atonement for himself and for his household, and he shall slaughter the bull of the sin offering which is for himself.

He shall take a firepan full of coals of fire from upon the altar before the Lord and two handfuls of finely ground sweet incense, and bring it inside the veil.

He shall put the incense on the fire before the Lord, so that the cloud of incense may cover the atoning cover that is on the ark of the testimony, otherwise he will die.