Mishkat al-Masabih

‘Uqba b. ‘Āmir said that when he asked God’s messenger whether he should recite sūra Hūd (Qur’ān, 11) or sūra Yūsuf (Qur’ān, 12), he told him he could recite nothing more effective with God than “Say, I seek refuge in the Lord of the dawn.” Ahmad, Nasā’i and Dārimī transmitted it.