"The Messenger of Allah (ﷺ) said the Qunut for a month."- (One of the narrators) Shu'bah said: "He cursed some men." Hisham said: "He supplicated against some of the tribes of Arabs."-"Then he stopped doing that after bowing." This is what Hisham said. Shu'bah said, narrating from Qatadah, from Anas that the Prophet (ﷺ) said the Qunut for a month, cursing Ri'l, Dhawkan and Lihyan.
Sunan an-Nasa'i Book 12, Hadith 49
← Previous Hadith The Prophet (ﷺ) used to say the Qunut in Subh and Maghrib. (One of the narrators) 'Ubaidullah said: "Allah's Messenger (ﷺ) used to."

Sunan an-Nasa'i Book 12, Hadith 48 Next Hadith → He heard the Prophet (ﷺ), when he raised his head in the last rak'ah of the subh prayer, say: "O Allah, curse so-and-so and so-and-so," supplicating against some of the hypocrites. Then Allah revealed the words: "Not for you is the decision; whether He turns in mercy to (pardon) them or punishes them; verily, they are the wrongdoers."

Sunan an-Nasa'i Book 12, Hadith 50