"The Messenger of Allah (S.A.W) said to me and to a companion of mine: 'When the time for prayer comes, let the two of you call the Adhan then the two of you say Iqamah, then let one of you lead the prayer.'"
Sunan an-Nasa'i Book 7, Hadith 44
← Previous Hadith "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.'"

Sunan an-Nasa'i Book 7, Hadith 43 Next Hadith → "When the call for the prayer is given, the Shaitan takes to his heels, passing wind loudly so that he will not hear the call to prayer. When the call to prayer is finished, he comes back. And when the Iqamah is said, he again takes to his heels, and after it is completed, he returns again to interfere between the (praying) person and his heart, saying to him: 'Remember such and such, remember such and such,' - things that he had not remembered - until he does not know how many (Rak'ahs) he has prayed."

Sunan an-Nasa'i Book 7, Hadith 45