Sahih al-Bukhari 916
Book 11: Friday Prayer · Hadith 40
Hadith text
Narrated Az-Zuhri:I heard As-Saib bin Yazid, saying, "In the lifetime of Allah's Messenger (ﷺ), and Abu Bakr and `Umar, the Adhan for the Jumua prayer used to be pronounced after the Imam had taken his seat on the pulpit. But when the people increased in number during the caliphate of `Uthman, he introduced a third Adhan (on Friday for the Jumua prayer) and it was pronounced at Az-Zaura' and that new state of affairs remained so in the succeeding years
Az-Zuhri bataate hain: "Maine As-Saib bin Yazid ko kehte suna: 'Allah ke Rasool, Abu Bakr aur Umar ke zamane mein, Jumme ki namaz ke liye Adhan Imam ke apni jagah (mimbar par) baithne ke baad di jaati thi. Magar jab Uthman ki khilafat mein log badh gaye, unhone ek teesri Adhan shuru ki, jo Az-Zaura mein di jaati thi, aur yeh silsila aage ke saalon mein bhi jaari raha.'"
Sahih al-Bukhari 916 · Book 11, Hadith 40