Abū Huraira reported God’s messenger as saying, “Expound the Qur’ān and take as guide its unusual expressions, they being the things made obligatory in it and the limits set in it.”
‘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.”
‘Ā’isha reported the Prophet as saying, “Reciting the Qur’ān during prayer is more excellent than reciting it at other times, and reciting the Qur’ān at a time other than during prayer is more excellent than extolling God and declaring His greatness. Extolling God is more excellent than sadaqa, sadaqa is more excellent than fasting, and fasting is a protection from hell.”
We went out one rainy and intensely dark night to look for God’s messenger, and when we caught up on him he said to me, “Say.” I asked him what I was to say, and he replied, “If you recite ‘Say, He is God, One’ and al-Mu'awidhatān (The last 3 sūras of the Qur’ān) three times morning and evening, they will serve you for every purpose.”