"Bilal did not delay the Adhan from its proper time, but he sometimes delayed the Iqamah a little."
Sunan Ibn Majah Book 3, Hadith 8
← Previous Hadith "The Messenger of Allah said: There are two characteristics in which the Muslims are dependent upon their Mu'adh-dhins: their prayer and their fasting."

Sunan Ibn Majah Book 3, Hadith 7 Next Hadith → "The last instruction that the Messenger of Allah gave to me was that I should not appoint a Mu'adh-dhin who took payment for the Adhan." (sahih)

Sunan Ibn Majah Book 3, Hadith 9