The LORD said to Moshe, "This is what you shall tell the children of Yisra'el: 'You yourselves have seen that I have talked with you from heaven.
You shall most certainly not make alongside of me gods of silver, or gods of gold for yourselves.
You shall make an altar of eretz for me, and shall sacrifice on it your burnt offerings and your peace-offerings, your sheep and your oxen. 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 hewn stones; for if you lift up your tool on it, you have polluted it.
Neither shall you go up by steps to my altar, that your nakedness may not be exposed to it.'