It hath heard It shall be as sure a witness against you as if it had heard. This is a common figure, whereby the sense of hearing is often ascribed to the heavens and the earth, and other senseless creatures.
Related Commentaries of Joshua 24:27
Joshua 24:27
27 And Joshua said unto all the people, Behold, this stone shall be a witness unto us; for it hath heard all the words of the LORD which he spake unto us: it shall be therefore a witness unto you, lest ye deny your God.