Exodus 20:25
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.
World English Bible (Public Domain)
In context
Before · Exodus 20:23–24
23You shall most certainly not make gods of silver or gods of gold for yourselves to be alongside me. 24You 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.
25If 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.
After · Exodus 20:26
26You shall not go up by steps to my altar, that your nakedness may not be exposed to it.’