Sunan al-Nasa'i The Book of Leading the Prayer (Al-Imamah) Abdah bin 'Abdullah al-Saffar عبدة بن عبد الله الصفار Aflah bin Sa'id al-Ansari أفلح بن سعيد الأنصاري Bryd'h bin Sufyan بريدة بن سفيان Zayd bin al-Habab al-'Akli زيد بن الحباب أبو الحسين العكلي “The Messenger of Allah (ﷺ) led us in Zuhr prayer and Abu Bakr was behind him. When the Messenger of Allah (ﷺ) said the Takbir, Abu Bakr said the Takbir so that the people could hear.” https://parallelquran.com/hadith/sunan-al-nasai-800/