Mishkat al-Masabih 2156 — Virtue of three Surahs in the Quran

Ibn ‘Abbās and Anas b. Mālik reported God’s messenger as saying that “When is shaken” (Qur’ān, 99) is equivalent to half the Qur’ān, “Say, He is God, One” (Qur’ān, 112) is equivalent to a third of the Qur’ān, and “Say, O infidels” (Qur’ān, 109) is equivalent to a quarter of the Qur’ān. Tirmidhī transmitted it.