(5) باب رَفْعِ الصَّوْتِ بِالنِّدَاءِ
Narrated `Abdur-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 Sa`id added, "I heard it (this narration) from Allah's Messenger (ﷺ)."
Reference: Sahih al-Bukhari 609
In-book reference: Book 10, Hadith 7
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 11, Hadith 583