Deuteronomy 27:5

New Century Version

Build an altar of stones there to the Lord your God, but don’t use any iron tool to cut the stones;

Cross References

1 Kings 6:7

The stones were prepared at the same place where they were cut from the ground. Since these stones were the only ones used to build the Temple, there was no noise of hammers, axes, or any other iron tools at the Temple.

Exodus 20:25

If you use stones to make an altar for me, don’t use stones that you have shaped with tools. When you use any tools on them, you make them unsuitable for use in worship.

Exodus 24:4

So Moses wrote down all the words of the Lord. And he got up early the next morning and built an altar near the bottom of the mountain. He set up twelve stones, one stone for each of the twelve tribes of Israel.

Deuteronomy 27:6

build the altar of the Lord your God with stones from the field. Offer burnt offerings on it to the Lord your God,