Musnad Ahmad 1017:41

Waki’ narrated to us, Bashir ibn al-Muhajir narrated to us, from ‘Abdullah ibn Buraydah, from his father, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Learn Surat al-Baqarah, for taking it is a blessing, leaving it is a regret, and the sorcerers (al-batalah) cannot withstand it." "Learn Surat al-Baqarah and Al ‘Imran, for they are the two radiant ones (al-zahrawan). They will come on the Day of Resurrection as if they are two clouds, or two shades, or as if they are two flocks of birds in rows, pleading for their companion."