Exod.20.25

And if thou wilt make me an altar of stone, thou shalt not build it of hewn stone: for if thou lift up thy tool upon it, thou hast polluted it.

Exod.20.25

If you use stones to make my Altar, don't use dressed stones. If you use a chisel on the stones you'll profane the Altar.

Exod.20.25

If you make an altar of stones for me, do not build it with dressed stones, for you will defile it if you use a tool on it.

Exod.20.25

And if you make Me an altar of stone, you shall not build it of hewn stone; for if you use your tool on it, you have profaned it.