Muwatta Malik, Book 7, Hadith 32 (USC-MSA) ⓘ
Yahya related to me from Malik that he had heard that Abdullah ibn Umar missed the two rakas of dawn, and then did them after the sun rose.
وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، فَاتَتْهُ رَكْعَتَا الْفَجْرِ فَقَضَاهُمَا بَعْدَ أَنْ طَلَعَتِ الشَّمْسُ .
also referenced under: Book 7, Hadith 286 (In-Book)