Imam al-Kazim (as): I heard Imam Musa al-Kazim (as) say: "Verily supplication wards off what has been decreed as well as what has not yet been decreed." I said: "I understood the part about what has been decreed, but how does supplication ward off something that has not even been decreed yet?" The Imam replied: "So that it world not befall the supplicant." al-Kāfī