Deuteronomy 27:6

New American Bible - revised edition

You shall build this altar of the Lord, your God, with unhewn stones, and shall offer on it burnt offerings to the Lord, your God.

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The house was built of stone dressed at the quarry, so that no hammer or ax, no iron tool, was to be heard in the house during its construction.

But if you make an altar of stone for me, do not build it of cut stone, for by putting a chisel to it you profane it.

and live in love, as Christ loved us and handed himself over for us as a sacrificial offering to God for a fragrant aroma.

and you shall build there an altar to the Lord, your God, an altar made of stones that no iron tool has touched.

You shall also offer communion sacrifices and eat them there, rejoicing in the presence of the Lord, your God.