Exodus 20:23-25 World English Bible (WEB)
23 You shall most certainly not make alongside of me gods of silver, or gods of gold for yourselves. 24 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. 25 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.