Sahih Muslim · Hadith 1586
The Book of Mosques and Places of Prayer - كتاب الْمَسَاجِدِ وَمَوَاضِعِ الصَّلاَةِ
حدثنا محمد بن المثنى، حدثنا عبد الرحمن، حدثنا هشام، عن قتادة، عن أنس، أن رسول الله صلى الله عليه وسلم قنت شهرا يدعو على أحياء من أحياء العرب ثم تركه .
Anas reported that the Messenger of Allah (may peace be upon him) observed Qunut for one month invoking curse upon some tribes of Arabia (those who were responsible for the murders in Bi'r Ma'una and Raji'), but then abandoned it.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).