حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ ضَمْرَةَ بْنِ سَعِيدٍ الْمَازِنِيِّ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، سَأَلَ أَبَا وَاقِدٍ اللَّيْثِيَّ مَا كَانَ يَقْرَأُ بِهِ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي الأَضْحَى وَالْفِطْرِ فَقَالَ كَانَ يَقْرَأُ فِيهِمَا بِـ ‏{‏ ق وَالْقُرْآنِ الْمَجِيدِ‏}‏ وَ ‏{‏ اقْتَرَبَتِ السَّاعَةُ وَانْشَقَّ الْقَمَرُ‏}‏

'Abdullah b. 'Umar reported that (his father) 'Umar b. Khattab asked Abu Waqid al-Laithi what the Messenger of Allah (PBUH) used to recite on 'Id-ul-Adha and 'Id-ul-Fitr. He said: He used to recite in them:" Qaf. By the Glorious Qur'an" (Surah 1)," The Hour drew near, and the moon was rent asunder" (Surah liv.). Translation Not Available

Book reference: Sahih Muslim Book 8 Hadith 1936
Web reference: Sahih Muslim Book 4 Hadith 891 a