Volume 1, Book 11, Number 583:
Narrated ‘Abdul Rahman:
Abu Sa’id Al-Khudri told my father, “I see you liking sheep and the wilderness. So whenever you
are with your sheep or in the wilderness and you want to pronounce Adhan for the prayer raise your
voice in doing so, for whoever hears the Adhan, whether a human being, a jinn or any other
creature, will be a witness for you on the Day of Resurrection.” Abu Said added, “I heard it (this nar –
ration) from Allah’s Apostle.”