(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'." (IT)
Reference (IT): Sunan Ibn Majah 715 (IT)
In-book reference (IT): Book 3, Hadith 10 (IT)
English translation (IT): Vol. 1, Book 3, Hadith 715 (IT)