Musnad Abu Ya'la al-Mawsili 106:21

Muhammad ibn al-Khattab narrated to us, Mu'ammal narrated to us, Sufyan narrated to us, from 'Amr ibn Murrah, from 'Abd al-Rahman ibn Abi Layla, from al-Bara' who said: The Prophet, may Allah bless him and grant him peace, performed Qunut in the Maghrib and the morning prayer. 'Amr said: I mentioned that to Ibrahim, so he became angry and said: "He was a man of authority," meaning Ibn Abi Layla.