In the Qur’an, a pious Muslim hears God’s voice guiding and encouraging, consoling and reproaching, promising the righteous mercy and eternal bliss, while threatening the wicked with wrath and eternal torment. For Muslims, the Qur’an is the word of God, which has entered human time to shape history. According to Muslim sources, the Angel Gabriel revealed himself to Prophet Muhammad in 610 CE while he was in prayerful retreat in a cave on Mount Hira, outside Mecca.