مُوَطَّأُ مَالِكٍ
Muwatta Malik 278
Tahajjud
وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَبْدَ اللَّهِ بْنَ عَبَّاسٍ، وَعُبَادَةَ بْنَ الصَّامِتِ، وَالْقَاسِمَ بْنَ مُحَمَّدٍ، وَعَبْدَ اللَّهِ بْنَ عَامِرِ بْنِ رَبِيعَةَ، قَدْ أَوْتَرُوا بَعْدَ الْفَجْرِ .
Yahya related to me from Malik that he had heard that Abdullah ibn Abbas and Ubada ibn as-Samit and al-Qasim ibn Muhammad and Abdullah ibn Amir ibn Rabia had all prayed witr after the break of dawn.
Arabic/English book reference: Book 7, Hadith 24