It is narrated from Hazrat Abu Mahdhurah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) himself taught me nineteen words of the adhan and seventeen words of the iqamah and said: Say «الله اكبر» four times, say «اشهدان لا اله الا الله» two times, say «اشهد ان محمدا رسول الله» two times, then say «حي على الصلاة» and «حي على الفلاح» each two times, then say «الله اكبر» two times, and then say «‏‏‏‏لا اله الا الله» . And the words of the iqamah are each said two times and there is no tarjeeh in them.

It is narrated from Hazrat Abu Mahzura (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) assigned the honor of giving the call to prayer (adhan) to us and our freed slaves, entrusted the service of providing water to Banu Hashim, and gave the office of key-bearer to Banu Abdud-Dar.