The Messenger of Allah ﷺ performed the qunut for a month after the bowing, supplicating against one of the Arab tribes, then he discontinued it.
حدثنا أبو نعيم حدثنا هشام عن قتادة
قنت رسول الله ﷺ شهرا بعد الركوع يدعو على حي من أحياء العرب ثم تركه
Its isnad is sahih, mentioned previously at 13207.