It was narrated from ‘Abdullâh bin ‘Abdur-Rahman bin Abu Sa’sa’ah that his father, who was under the care of Abu Sa’eed, said: “Abu Sa’eed said to me: ‘If you are in the desert, raise your voice when you say the Adhân, for I heard the Messenger of Allah P.B.U.H say: ‘No jinn, human, tree or rock will hear it, but it will bear witness for you.’” (Sahih)