(a) Amr bin Murrah says: I heard Ibn Abi Layla narrate from Sayyiduna al-Bara' (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) used to recite qunut in the morning prayer.
Amr says: I mentioned this to Ibrahim al-Nakha'i (may Allah have mercy on him), and he said: He is not like the students of Abdullah bin Mas'ud (may Allah be pleased with him); he was a man given to disputation. He says: I went back and abandoned qunut. Then the people of the mosque said: By Allah, we do not see in the mosque what has always been done in our mosque. He says: So I resumed qunut. This reached Ibrahim al-Nakha'i (may Allah have mercy on him), and he met me and said: This man is overpowered in his own prayer.
(b) Shaykh al-Bayhaqi (may Allah have mercy on him) says: This (stance) of Ibrahim al-Nakha'i (may Allah have mercy on him) is not approved. Knowledge is not such that whatever is not found with the students of Abdullah bin Mas'ud (may Allah be pleased with him), but is found with others, is not to be taken; rather, it is taken if it comes from one of higher standing than the students of Abdullah bin Mas'ud (may Allah be pleased with him) and the narrator is trustworthy, and Abd al-Rahman bin Abi Layla is a trustworthy (thiqah) narrator.
Amr bin Murrah reported about the people of the mosque that this practice (of observing qunut) had always continued in their mosque.
Likewise, a narration of Sayyiduna al-Bara' (may Allah be pleased with him) has reached us through another chain, that he recited qunut in the Fajr prayer.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3119