Abu Umamah reported: I heard the Messenger of Allah, peace and blessings be upon him, say, “Recite the Quran, for on the Day of Resurrection it will come as an intercessor for its reciters. Recite the two illuminated chapters, Surat Al-Baqarah and Ali Imran, for on the Day of Resurrection they will come as two clouds, or two shades, or two flocks of birds pleading for those who recited them. Recite Surat Al-Baqarah as there is blessing in it, there is sorrow in leaving it, and the sorcerers cannot confront it.”

Source: Sahih Muslim 804

Grade: Sahih (authentic) according to Muslim

أَبُو أُمَامَةَ الْبَاهِلِيُّ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ اقْرَءُوا الْقُرْآنَ فَإِنَّهُ يَأْتِي يَوْمَ الْقِيَامَةِ شَفِيعًا لِأَصْحَابِهِ اقْرَءُوا الزَّهْرَاوَيْنِ الْبَقَرَةَ وَسُورَةَ آلِ عِمْرَانَ فَإِنَّهُمَا تَأْتِيَانِ يَوْمَ الْقِيَامَةِ كَأَنَّهُمَا غَمَامَتَانِ أَوْ كَأَنَّهُمَا غَيَايَتَانِ أَوْ كَأَنَّهُمَا فِرْقَانِ مِنْ طَيْرٍ صَوَافَّ تُحَاجَّانِ عَنْ أَصْحَابِهِمَا اقْرَءُوا سُورَةَ الْبَقَرَةِ فَإِنَّ أَخْذَهَا بَرَكَةٌ وَتَرْكَهَا حَسْرَةٌ وَلَا تَسْتَطِيعُهَا الْبَطَلَةُ

804 صحيح مسلم كِتَاب صَلَاةِ الْمُسَافِرِينَ وَقَصْرِهَا باب فَضْلِ قِرَاءَةِ الْقُرْآنِ وَسُورَةِ الْبَقَرَةِ

http://dailyhadith.abuaminaelias.com/2012/07/31/hadith-on-quran-read-al-baqarah-and-ali-imran-because-there-is-blessing-in-them-and-sorrow-in-ignoring-them/