Overall meaning : The unbelievers will continue to doubt the Qur’an until the Day of Judgement comes upon them unawares or until the punishment of a disastrous day overtakes them.
All sovereignty on the Day of Resurrection will belong to Allah alone, and He will judge between the believers and unbelievers. Those who believe and do righteous deeds will be in the Gardens of Delight in Paradise, but those who disbelieve in Allah and His Messenger and deny the verses of the Qur’an will suffer a humiliating punishment in Hell.