Musannaf Ibn Abi Shayba 3:1897

Ghundar narrated to us, from Shu'bah, from Abu Ishaq, who said: I heard him narrating about al-Dahhak ibn Qays: That he delivered a sermon and recited [Surah] Sad, so he prostrated during it, while Alqamah and the companions of Abdullah were behind him, and they did not prostrate.