Musannaf Ibn Abi Shayba 33:1378

Abu Usama narrated to us, from Jarir, from Humayd ibn Hilal, who said: Abu Qatada al-Adawi said to us: "You must follow this shaykh," meaning al-Hasan. "For I have not seen anyone more similar in opinion to Umar ibn al-Khattab than him."