Deuteronomy 27:2-3, 8

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.

You must clearly write all these instructions on the stones coated with plaster.”