Sunan Abi Dawud Knowledge (Kitab Al-Ilm) Abdullah ibn al-Zubayr Amir bin 'Abdullah عامر بن عبد الله بن الزبير بن العوام Amr bin 'Awn/'Auf bin Aws Byan bin Bashr al-Ahmsi بيان بن بشر الأحمسي Khalid bin 'Abdullah al-Tahan خالد بن عبد الله بن عبد الرحمن الطحان Masdad bin Masrhad مسدد بن مسرهد بن مسربل Sahih I asked Abu `Amr: What are they writing? He said: The sermon which he heard that day. https://parallelquran.com/hadith/sunan-abi-dawud-3650/