In-book : Book 33, Hadith 21
USC-MSA web (English) : Vol. 3, Book 33, Hadith 262 (deprecated)
33. 'Retiring to a Mosque for Remembrance of Allah (I''tikaf)'
باب هَلْ يَتَتَبَّعُ الْمُؤَذِّنُ فَاهُ هَا هُنَا وَهَا هُنَا، وَهَلْ يَلْتَفِتُ فِي الأَذَانِ