Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: I spent the night with the Prophet (peace and blessings be upon him) so that I could see how he (peace and blessings be upon him) recited the qunut in witr. He (peace and blessings be upon him) recited the qunut before the bowing. Then I sent my mother, Umm Ma'bad (may Allah be pleased with her), to spend the night with his (peace and blessings be upon him) wives and see how he (peace and blessings be upon him) recited the qunut in his witr. When she came back, she said that the qunut was before the bowing.
The hadith revolves around Aban bin Abi Ayyash, and Aban is matruk (abandoned).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4865