(3) باب السُّنَّةِ فِي الأَذَانِ
It was narrated that Bilal said:
"The Messenger of Allah commanded me (with Tathwib) in the Adhan for Fajr, and he forbade me to do so in the Adhan for 'Isha'." (JA)
Reference (JA): Sunan Ibn Majah 715 (JA)
In-book reference (JA): Book 3, Hadith 10 (JA)
English translation (JA): Vol. 1, Book 3, Hadith 715 (JA)