Ezekiel 43:16-21

“The top of the altar, the hearth, is square, twenty-one by twenty-one feet. The upper ledge is also square, twenty-four and a half feet on each side, with a ten-and-a-half-inch lip and a twenty-one-inch-wide gutter all the way around. “The steps of the altar ascend from the east.” Then the man said to me, “Son of man, GOD, the Master, says: ‘These are the ordinances for conduct at the altar when it is built, for sacrificing burnt offerings and sprinkling blood on it. “‘For a sin offering, give a bull to the priests, the Levitical priests who are from the family of Zadok who come into my presence to serve me. Take some of its blood and smear it on the four horns of the altar that project from the four corners of the top ledge and all around the lip. That’s to purify the altar and make it fit for the sacrifice. Then take the bull for the sin offerings and burn it in the place set aside for this in the courtyard outside the Sanctuary.