They swear by God with their most solemn oaths that if a miracle (of the kind they desire) is shown to them, they will believe in it. Say: "Miracles are in God’s power alone (His is the sole authority to produce them or not)." (O believers, who think that if such a miracle were produced, the unbelievers would believe:) Are you not aware that even if such a miracle were shown to them, they would not believe?