Musnad Ahmad 32:212

Yahya ibn Sa'id narrated to us, al-Taymi narrated to us, from Abu Mijlaz, from Anas, who said: The Messenger of Allah (peace and blessings of Allah be upon him) performed Qunut for a month after the bowing (ruku'), supplicating against Ri'l and Dhakwan. And he said: "Usayyah disobeyed Allah and His Messenger."