"These are the dimensions of the altar by cubits (the cubit being a cubit and a handbreadth): its base shall be one cubit high, and one cubit broad, with a rim of one span around its edge. And this shall be the height of the altar:
from the base on the ground to the lower ledge, two cubits, with a breadth of one cubit; and from the smaller ledge to the larger ledge, four cubits, with a breadth of one cubit;
and the altar hearth, four cubits; and from the altar hearth projecting upward, four horns, one cubit high.
The altar hearth shall be square, twelve cubits long by twelve broad.
The ledge also shall be square, fourteen cubits long by fourteen broad, with a rim around it half a cubit broad, and its base one cubit round about. The steps of the altar shall face east."
And he said to me, "Son of man, thus says the Lord GOD: These are the ordinances for the altar: On the day when it is erected for offering burnt offerings upon it and for throwing blood against it,
you shall give to the Levitical priests of the family of Zadok, who draw near to me to minister to me, says the Lord GOD, a bull for a sin offering.
And you shall take some of its blood, and put it on the four horns of the altar, and on the four corners of the ledge, and upon the rim round about; thus you shall cleanse the altar and make atonement for it.
You shall also take the bull of the sin offering, and it shall be burnt in the appointed place belonging to the temple, outside the sacred area.
And on the second day you shall offer a he-goat without blemish for a sin offering; and the altar shall be cleansed, as it was cleansed with the bull.
When you have finished cleansing it, you shall offer a bull without blemish and a ram from the flock without blemish.
You shall present them before the LORD, and the priests shall sprinkle salt upon them and offer them up as a burnt offering to the LORD.
For seven days you shall provide daily a goat for a sin offering; also a bull and a ram from the flock, without blemish, shall be provided.
Seven days shall they make atonement for the altar and purify it, and so consecrate it.
And when they have completed these days, then from the eighth day onward the priests shall offer upon the altar your burnt offerings and your peace offerings; and I will accept you, says the Lord GOD."
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (Revised Standard Version - Holy Bible)