Joshua 24:23-27, Psalm 89:37

When Joshua is about ready to die, he puts up a big rock as a witness for the people.  One definition for witness in Webster’s New World Dictionary is, “to be present at-bear witness to testify.”

Ethan the Ezrahite refers to the moon as a witness.  The moon is largely made up of rock (, so in my opinion, rocks, “rock” as witnesses.