Ezekiel 43:16-20

Now the altar hearth shall be twelve cubits long by twelve wide, square in its four sides.

And the ledge shall be fourteen cubits long by fourteen wide in its four sides, the border around it shall be half a cubit, and its base shall be a cubit all around; and its steps shall face east.” The Offerings

And He said to me, “Son of man, this is what the Lord God says: ‘These are the statutes for the altar on the day it is built, to offer burnt offerings on it and to sprinkle blood on it.

You shall give to the Levitical priests who are from the descendants of Zadok, who come near to Me to serve Me,’ declares the Lord God, ‘a bull as a sin offering.

And you shall take some of its blood and put it on its four horns and on the four corners of the ledge, and on the border all around; so you shall cleanse it and make atonement for it.