Sunan Ibn Majah, Volume 2, Book 5, Hadith 841 (DarusSalam) ⓘ
It was narrated that from ‘Amr bin Shu’aib, from his father, from his grandfather, that the Messenger of Allah said: “Every prayer in which Fatihatil-Kitab (the Opening of the Book) is not recited, it is deficient, it is deficient.”
حَدَّثَنَا الْوَلِيدُ بْنُ عَمْرِو بْنِ السُّكَيْنِ، حَدَّثَنَا يُوسُفُ بْنُ يَعْقُوبَ السَّلْعِيُّ، حَدَّثَنَا حُسَيْنٌ الْمُعَلِّمُ، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ قَالَ " كُلُّ صَلاَةٍ لاَ يُقْرَأُ فِيهَا بِفَاتِحَةِ الْكِتَابِ فَهِيَ خِدَاجٌ فَهِيَ خِدَاجٌ " .
also referenced under: Hadith 841 (Reference) & Book 5, Hadith 890 (In-Book)