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
← Previous Hadith "I shall explain to you the prayer of the Messenger of Allah (ﷺ)." He said: "Abu Hurairah used to say the Qunut in the last rak'ah of the Zuhr prayer, and the later Isha' prayer, and the Subh, after saying 'Sami Allahu liman hamidah.' He would pray for the believers and curse the disbelievers.'"

Sunan an-Nasa'i Book 12, Hadith 47 Next Hadith → "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