Deuteronomy 27:5-10

5Then you must build an altar there to the Lord your God, an altar of stones – do not use an iron tool on them.

6You must build the altar of the Lord your God with whole stones and offer burnt offerings on it to the Lord your God.

7Also you must offer fellowship offerings and eat them there, rejoicing before the Lord your God.

8You must inscribe on the stones all the words of this law, making them clear.”

9Then Moses and the Levitical priests spoke to all Israel: “Be quiet and pay attention, Israel. Today you have become the people of the Lord your God.

10You must obey him and keep his commandments and statutes that I am giving you today.”