Deuteronomy 27:1-8

Now Moses, with the elders of Israel, commanded the people, saying: “Keep all the commandments which I command you today. And it shall be, on the day when you cross over the Jordan to the land which the LORD your God is giving you, that you shall set up for yourselves large stones, and whitewash them with lime. You shall write on them all the words of this law, when you have crossed over, that you may enter the land which the LORD your God is giving you, ‘a land flowing with milk and honey,’ just as the LORD God of your fathers promised you. Therefore it shall be, when you have crossed over the Jordan, that on Mount Ebal you shall set up these stones, which I command you today, and you shall whitewash them with lime. And there you shall build an altar to the LORD your God, an altar of stones; you shall not use an iron tool on them. You shall build with whole stones the altar of the LORD your God, and offer burnt offerings on it to the LORD your God. You shall offer peace offerings, and shall eat there, and rejoice before the LORD your God. And you shall write very plainly on the stones all the words of this law.”