Musnad Abu Ya'la al-Mawsili 152:150

Abu Khaythama narrated to us, Waki' narrated to us, Isra'il narrated to us, from Abu Ishaq, from al-Aswad, from Ibn Mas'ud: That the Prophet (peace be upon him) prostrated during [the recitation of] *an-Najm*, and the Muslims prostrated, except for a man from Quraysh who took a handful of soil and raised it to his forehead, and he prostrated upon it. 'Abdullah [Ibn Mas'ud] said: And I saw him killed as a disbeliever.