Deuteronomy 27:2-8

21So it shall be on the day when you cross the Jordan to the land which the Lord your God is giving you, that you shall set up for yourself large stones and coat them with lime 3and write on them all the words of this Law, when you cross over, so that you may enter the land which the Lord your God is giving you, 2a land flowing with milk and honey, just as the Lord, the God of your fathers, 3promised you. 4So it shall be when you cross the Jordan, you shall set up these stones 4on Mount Ebal, 5as I am commanding you today, and you shall coat them with lime. 5Moreover, you shall build there an altar to the Lord your God, an altar of stones; you 6shall not wield an iron tool on them. 6You shall build the altar of the Lord your God of 7uncut stones, and you shall offer on it burnt offerings to the Lord your God; 7and you shall sacrifice peace offerings and eat there, and 8rejoice before the Lord your God. 8You shall write on the 9stones all the words of this Law very clearly.”