al-Zahrawaan
Question

                what are the two surhas that have been called"as-zahrawan"?
Praise be to Allah. 
          These two soorahs are al-Baqarah and Aal ‘Imraan.
 
           It was proven in a hadeeth narrated by Imaam Muslim 
          (may Allaah have mercy on him) that Abu Umaamah al-Baahili said: “I 
          heard the Messenger of Allaah 
          
          (peace and blessings of Allaah be upon him) say: ‘Read the Qur’aan, 
          for it will come on the Day of Resurrection to intercede for its companions 
          [those who read it]. Read al-Zahrawaan (the two bright ones), al-Baqarah 
          and Aal ‘Imraan, for they will come on the Day of Resurrection like 
          two clouds or like two shades or two flocks of birds spreading their 
          wings, pleading for those who recite them. Recite Soorat al-Baqarah, 
          for taking recourse to it is a blessing and giving it up is a cause 
          of loss, and the magicians cannot confront it.” 
 
          (Salaat al-Musaafireen, 1337). Al-Nawawi said 
          in his commentary on Saheeh Muslim: they said, they are called 
          al-Zahrawaan (the two bright ones) because of their light and guidance, 
          and the greatness of their reward.