Muwatta Malik, Book 7, Hadith 278 (In-Book)

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.

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 ‏.‏

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also referenced under: Book 7, Hadith 24 (USC-MSA)