Musnad Ahmad 32:124

Ibn Abi ‘Adi narrated to us, from Sa‘id, and Ibn Ja‘far narrated to us, Sa‘id narrated the meaning, from Qatadah, from Anas, that the Prophet of Allah, may Allah bless him and grant him peace, was approached by [the tribes of] Ri‘l, Dhakwan, ‘Usayyah, and Banu Lihyan. They claimed that they had accepted Islam, and they sought his aid against their people. So, the Prophet of Allah, may Allah bless him and grant him peace, aided them on that day with seventy of the Ansar. Anas said: We used to call them in their time "the reciters" (al-qurra’). They would gather firewood by day and pray by night. They set out with them until, when they reached Bi’r Ma‘unah, they betrayed them and killed them. The Messenger of Allah, may Allah bless him and grant him peace, performed Qunut for a month in the morning prayer, supplicating against these tribes: Ri‘l, Dhakwan, ‘Usayyah, and Banu Lihyan. He said: Qatadah said: And Anas narrated to us that they recited regarding them a Quranic verse—and Ibn Ja‘far said in his narration: "We recited regarding them a Quranic verse"—: "Convey to our people on our behalf that we have met our Lord, so He is pleased with us and has pleased us." Then that was lifted afterward. Ibn Ja‘far said: Then that was abrogated, or lifted.