(3) باب السُّنَّةِ فِي الأَذَانِ
It was narrated that Jabir bin Samurah said:
"Bilal did not delay the Adhan from its proper time, but he sometimes delayed the Iqamah a little." (ID)
Reference (ID): Sunan Ibn Majah 713 (ID)
In-book reference (ID): Book 3, Hadith 8 (ID)
English translation (ID): Vol. 1, Book 3, Hadith 713 (ID)