Musannaf Ibn Abi Shaybah

Hazrat Abdullah says that the Prophet (peace and blessings of Allah be upon him) used to recite the Du'a Qunoot in Witr before bowing (ruku). Hazrat Abdullah says that I sent my mother, Umm Abd, who spent the night with the wives of the Prophet (peace and blessings of Allah be upon him), then she informed me that the Prophet (peace and blessings of Allah be upon him) recited the Du'a Qunoot in Witr before bowing (ruku).