Deuteronomy 27:5

Catholic Public Domain Version

and you shall build, in that place, an altar to the Lord your God out of stones which have not been touched by iron,

Cross References

1 Kings 6:7

Now the house, while it was being built, was made from cut and finished stones. And so, neither mallet, nor chisel, nor any tool of iron was heard in the house while it was being built.

Exodus 20:25

And if you make an altar of stone for me, you shall not build it from cut stones; for if you lift up a tool over it, it will be defiled.

Exodus 24:4

Then Moses wrote all the words of the Lord. And rising up in the morning, he built an altar at the base of the mountain, with twelve titles according to the twelve tribes of Israel.

Deuteronomy 27:6

out of stones which have not been hewn or polished. And you shall offer holocausts on it to the Lord your God.