Deuteronomy 27:2-8

2Now on the day when you cross over the Jordan to the land that Adonai your God is giving you, you are to set up large stones for yourself and coat them with plaster.

3Then you are to write on them all the words of this Torah when you cross over—so that you may enter the land that Adonai your God is giving you, a land flowing with milk and honey just as Adonai, the God of your fathers, promised you.

4Now when you cross over the Jordan, you are to set up these stones about which I am commanding you today on Mount Ebal, and coat them with plaster.

5There also you will build an altar to Adonai your God, an altar of stones—you are not to use an iron tool on them.

6You are to build the altar of Adonai your God of whole stones, and you are to offer up burnt offerings on it to Adonai your God.

7You are to sacrifice fellowship offerings and eat there, and you will rejoice before Adonai your God.

8You are to write on the stones all the words of this Torah very clearly.”