Hadith #3650 (Sunan Abi Dawud)
Book: Knowledge (Kitab Al-Ilm)
Narrator(s): 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
Grade: Sahih

I asked Abu `Amr: What are they writing? He said: The sermon which he heard that day.

Source: https://parallelquran.com/hadith/sunan-abi-dawud-3650/