The Messenger of Allah ﷺ performed the qunut for a month after the bowing, supplicating against certain Arab tribes, then he abandoned it.
حدثنا أبو قطن حدثنا هشام عن قتادة
قنت رسول الله ﷺ شهرا بعد الركوع يدعو على أحياء من أحياء العرب ثم تركه
The isnad of this hadith is sahih. It has already appeared at 12091.