Deuteronomy 27:1-8

Then Moses and the leaders of Israel gave this charge to the people: “Obey all these commands that I am giving you today. When you cross the Jordan River and enter the land the LORD your God is giving you, set up some large stones and coat them with plaster. Write this whole body of instruction on them when you cross the river to enter the land the LORD your God is giving you—a land flowing with milk and honey, just as the LORD, the God of your ancestors, promised you. When you cross the Jordan, set up these stones at Mount Ebal and coat them with plaster, as I am commanding you today. “Then build an altar there to the LORD your God, using natural, uncut stones. You must not shape the stones with an iron tool. Build the altar of uncut stones, and use it to offer burnt offerings to the LORD your God. Also sacrifice peace offerings on it, and celebrate by feasting there before the LORD your God. You must clearly write all these instructions on the stones coated with plaster.”