Exodus 27:7

‘You shall make an altar of earth for Me, and you shall sacrifice on it your burnt offerings and your peace offerings, your sheep and your oxen; in every place where I cause My name to be remembered, I will come to you and bless you.

the altar of burnt offering with its bronze grating, its poles, and all its utensils, the laver and its stand;

Then he made the altar of burnt offering of acacia wood, five cubits long, and five cubits wide, square, and three cubits high.

“Then they shall take away the ashes from the altar and spread a purple cloth over it.

But Aaron and his sons offered offerings up in smoke on the altar of burnt offering and on the altar of incense, for all the work of the Holy of Holies, and to make atonement for Israel, according to all that Moses the servant of God had commanded.

“And these are the measurements of the altar by cubits (the cubit being a cubit and a handbreadth): the base shall be a cubit and the width a cubit, and its border on its edge round about one span; and this shall be the height of the base of the altar.