Ezekiel 43:15-20

15Above that, the altar hearth is four cubits high, and four horns project upward from the hearth. 16The altar hearth is square, twelve cubits That is, about 21 feet or about 6.4 meters long and twelve cubits wide.

17The upper ledge also is square, fourteen cubits That is, about 25 feet or about 7.4 meters long and fourteen cubits wide. All around the altar is a gutter of one cubit with a rim of half a cubit. That is, about 11 inches or about 27 centimeters The steps of the altar face east.” 18Then he said to me, “Son of man, this is what the Sovereign LORD says: These will be the regulations for sacrificing burnt offerings and splashing blood against the altar when it is built: 19You are to give a young bull as a sin offering Or purification offering; also in verses 21, 22 and 25 to the Levitical priests of the family of Zadok, who come near to minister before me, declares the Sovereign LORD . 20You are to take some of its blood and put it on the four horns of the altar and on the four corners of the upper ledge and all around the rim, and so purify the altar and make atonement for it.