Joshua 24:26-27

26 And Joshua wrote these words in the book of the law of God, and took a great stone, and set it up there under an oak, that was by the sanctuary of the LORD.

27 And Joshua said to all the people, Behold, this stone shall be a witness to us; for it has heard all the words of the LORD which he spoke to us: it shall be therefore a witness to you, lest you deny your God.