Joshua 24:26-27

And Joshua wrote these words in the Book of the Law of God. Then he took a large stone and set it up there under the oak that was in [the courtyard of] the sanctuary of the LORD. Joshua then said to all the people, “Look, this stone shall serve as a witness against us, for it has heard all the words of the LORD which He spoke to us; so it shall be a witness against you, so that [afterward] you do not deny your God.”