Nasai

´It was narrated that Abu Al-Muthanna, the Mu'adhdhin of the Jami' Masjid, said:` "I asked Ibn 'Umar about the Adhan and he said: 'At the time of the Messenger of Allah (S.A.W), the phrases of the Adhan were recited twice and the phrases of Iqamah once, except that you should say (the phrase) Qad qamat is-salah (prayer is about to begin)twice. When we heard 'prayer is about to begin' we would perform Wudu' and go out to pray.'"

Narrated Abdullah ibn Umar: The words of adhan were pronounced from the time of the Messenger of Allah ﷺ twice in pairs (i. e. four times) each, and the words of iqamah were pronounced once in pairs (twice each), except that the phrase "The time for prayer has come" would be pronounced twice. When we heard iqamah, we would perform ablution, and go out for prayer. Shubah said: I did not hear Abu Jafar narrating any other tradition except this one.