"The Adhan during the time of Allah's Messenger, Abu Bakr, and Umar was when the Imam came out, added a third call at Az-Zawra."
Jami` at-Tirmidhi Book 4, Hadith 29
← Previous Hadith "I heard Umarah bin Rawaibah Ath-Thaqafi - while Bishr bin Marwan was delivering Khutbah and raising his hands in supplication - so Umarah said: 'May Allah disgrace these two insignificant hands, I have seen Allah's Messenger, and he would not do any more than this;'" and Hushaim (one of the narrators) motioned with his index finger.

Jami` at-Tirmidhi Book 4, Hadith 28 Next Hadith → "Allah's Messenger would talk as necessary after descending from the Minbar."

Jami` at-Tirmidhi Book 4, Hadith 30