Adhan announces prayer time; it is measured, consists of 15 units in the ordinary Hanafi formula, and Fajr adds “prayer is better than sleep” twice.
Iqamah announces immediate commencement; it is brisker and adds “qad qamat al-salah” twice, giving 17 units in the standard Hanafi formula.
Both should be pronounced correctly, preferably in ritual purity and facing the qiblah.
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Bab al-Adhan: The Adhan, Iqamah and Juristic Rulings
Adhan announces prayer time; it is measured, consists of 15 units in the ordinary Hanafi formula, and Fajr adds “prayer is better than sleep” twice.
Iqamah announces immediate commencement; it is brisker and adds “qad qamat al-salah” twice, giving 17 units in the standard Hanafi formula.
Both should be pronounced correctly, preferably in ritual purity and facing the qiblah.