Musannaf Ibn Abi Shayba 3:1969

Hushaym narrated to us, he said: Khalid ibn al-Aryan al-Mujashi’i narrated to us, from Ibn Abbas, and they mentioned the prostrations of the Quran. He said: Al-A’raf, al-Ra’d, al-Nahl, Bani Isra’il, Maryam, and al-Hajj are one prostration. And al-Naml, al-Furqan, Alif-Lam-Mim Tanzil, Ha-Mim al-Sajdah, and Sad. He said: There is no prostration in the Mufassal.