Musannaf Ibn Abi Shaybah 5349 — Sitting in ihtiba on Friday

Salim al-Khayyat said: Al-Hasan, Muhammad (Ibn Sirin), Ikrimah bin Khalid, Amr bin Dinar, Abu al-Zubayr and Ata used to sit in the ihtiba' posture during the imam's khutbah on Friday.