They say, “O you to whom the Reminder [Qur’an] is sent down! You must be mad! Why do you not bring us the angels, if you should be among the truthful?” We do not send down the angels except with truth; and they [the disbelievers] would not then be given respite. Indeed, it is We who sent down the Reminder [the Qur’ān], and indeed, We will be its guardian.