Musnad Ahmad 1153:1147

Muhammad ibn Ja'far narrated to us, from Shu'bah, from Qatadah, from Zurarah ibn Awfa, from Sa'd ibn Hisham, from 'Aishah, from the Prophet (peace be upon him), who said: "The two rak'ahs of the dawn are better than the entire world." He said: Qatadah used to follow this hadith by saying, "They are more beloved to me than red camels."