Hadithcore
Mishkat al-Masabih, 683

He also told of God's Messenger saying to them, “Pray as you have seen me prayer, and when the time for prayer comes one of you should call the <i>adhan</i> for you and the oldest of you should act as <i>imam</i>.”* * In this tradition the plural is used throughout; in the preceding the dual is used, two persons being referred to. (Bukhari and Muslim.)

وَعَنْهُ قَالَ: قَالَ لَنَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «صَلُّوا كَمَا رَأَيْتُمُونِي أُصَلِّي فَإِذا حضرت الصَّلَاة فليؤذن لكم أحدكُم وليؤمكم أكبركم»

References1 variant
In-Book Reference
Book 4, Hadith 115