Sunan Ibn Majah, Volume 2, Book 5, Hadith 1184 (DarusSalam) ⓘ
It was narrated that Muhammad said: “I asked Anas bin Malik about Qunut, and he said: ‘The Messenger of Allah recited Qunut after Ruku’.’”
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا عَبْدُ الْوَهَّابِ، حَدَّثَنَا أَيُّوبُ، عَنْ مُحَمَّدٍ، قَالَ سَأَلْتُ أَنَسَ بْنَ مَالِكٍ عَنِ الْقُنُوتِ، فَقَالَ قَنَتَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ بَعْدَ الرُّكُوعِ .
also referenced under: Hadith 1184 (Reference) & Book 5, Hadith 1240 (In-Book)