Musannaf Ibn Abi Shayba 3:3040

Yahya ibn Abi Bukayr narrated to us, he said: My father Bukayr narrated to me, he said: My father narrated to me, he said: I reached the people before Umar ibn Abd al-Aziz, and they used to perform Qunut in the Friday prayer. Then, when it was the time of Umar ibn Abd al-Aziz, he abandoned the Qunut in the Friday prayer.