(19) باب هَلْ يَتَتَبَّعُ الْمُؤَذِّنُ فَاهُ هَا هُنَا وَهَا هُنَا، وَهَلْ يَلْتَفِتُ فِي الأَذَانِ
Narrated `Aun bin Abi Juhaifa:
My father said, "I saw Bilal turning his face from side to side while pronouncing the Adhan for the prayer."
Reference: Sahih al-Bukhari 634
In-book reference: Book 10, Hadith 31
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 11, Hadith 607