Musnad Ahmad 32:2008

Abu Sa’id, the freed slave of Banu Hashim, narrated to us, Shu’bah narrated to us, Qatadah narrated to us, from Anas, who said: "The Messenger of Allah (ﷺ) performed Qunut for a month, supplicating against Ri’l, Dhakwan, the sons of so-and-so, and Usayyah, for they disobeyed Allah and His Messenger." Marwan said—meaning—I said to Anas: "Did Umar perform Qunut?" He said: "Umar, no."