It was narrated from 'Abdullah 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 Adhan, for I heard the Messenger of Allah say: 'No jinn, human, tree or rock will hear it, but it will bear witness for you.'