Saaib bin Yazid reported,
The Messenger of Allah ﷺ had only one caller to prayer. When he came out, the caller would give the adhan, and when he descended, he would call the iqamah. It was the same during the time of Abu Bakr and Umar.When Uthman came to power and the people had grown in number, he added a third call from a house in the marketplace called al-Zawra. When he came out, the caller would give the adhan, and when he descended, he would call the iqamah.
Ibn Majah 1135
Sahihحدثنا يوسف بن موسى القطان حدثنا جرير ح و حدثنا عبد الله بن سعيد حدثنا أبو خالد الأحمر جميعا عن محمد بن إسحق عن الزهري
عن السائب بن يزيد قال
ما كان لرسول الله ﷺ إلا مؤذن واحد إذا خرج أذن وإذا نزل أقام وأبو بكر وعمر كذلك فلما كان عثمان وكثر الناس زاد النداء الثالث على دار في السوق يقال لها الزوراء فإذا خرج أذن وإذا نزل أقام
Hadith no. 1088, from the hadith of Jumuah. Takhrij: [sahih]. Abu Dawud narrated it in the Book of Prayer, chapter on the call on the day of Jumuah, from Ibn Ishaq, with this wording, though his version contains an objectionable addition. The basis of the hadith was narrated by Bukhari, nos. 912, 913, 915, 916, and others, from the hadith of Zuhri, with this wording. Tabarani also narrated it in al-Kabir, 7/174, no. 6646, with a sahih chain, from Sulayman Taymi, from Zuhri, with this wording, and in it, "The call was made, in the time of the Messenger of Allah ﷺ and Abu Bakr and Umar 
, at the pulpit."