Bible Verses About Altars: To be made of earth, or unhewn stone

You shall make an altar of earth for me, and shall sacrifice on it your burnt offerings and your peace offerings, your sheep and your cattle. In every place where I record my name I will come to you and I will bless you.

If you make me an altar of stone, you shall not build it of cut stones; for if you lift up your tool on it, you have polluted it.

There you shall build an altar to the LORD your God, an altar of stones. You shall not use any iron tool on them.

You shall build the altar of the LORD your God of uncut stones. You shall offer burnt offerings on it to the LORD your God.