Exodus 20:26 BBE

²⁴  Make for me an altar of earth, offering on it your burned offerings and your peace-offerings, your sheep and your oxen: in every place where I have put the memory of my name, I will come to you and give you my blessing.

²⁵  And if you make me an altar of stone do not make it of cut stones: for the touch of an instrument will make it unclean.

²⁶  And do not go up by steps to my altar, for fear that your bodies may be seen uncovered.