Musnad Abu Ya'la al-Mawsili 133:23

Ishaq ibn Abi Isra'il narrated to us, Abd al-Warith ibn Sa'id narrated to us, Ali ibn Zayd narrated to us, from Anas: That when the Messenger of Allah (ﷺ) came upon the slain of Bi'r Ma'una, he stood for the morning prayer. He said: When he would raise his head from the last rak'ah, he would stand upright, then say: "O Allah, curse Ri'l, Dhakwan, and Usayyah, for they disobeyed Allah and His Messenger," three times. Then he would say the takbir and prostrate. He said: So I memorized that from the Messenger of Allah (ﷺ) for thirty days, as he was doing it.