[Machine] The Quran was revealed in its entirety to the lower heaven on the Night of Decree, and then revealed after that over the course of twenty years. "And they bring you not an example but We bring you the truth and the best interpretation of it." [Al-Furqan 33] "And [it is] a Qur'an which We have separated [by intervals] that you might recite it to the people over a prolonged period. And We have sent it down progressively." [Al-Isra' 106]
أُنْزِلَ الْقُرْآنُ جُمْلَةً وَاحِدَةً إِلَى السَّمَاءِ الدُّنْيَا فِي لَيْلَةِ الْقَدْرِ ثُمَّ أُنْزِلَ بَعْدَ ذَلِكَ بِعِشْرِينَ سَنَةً {وَلَا يَأْتُونَكَ بِمَثَلٍ إِلَّا جِئْنَاكَ بِالْحَقِّ وَأَحْسَنَ تَفْسِيرًا} [الفرقان 33] {وَقُرْآنًا فَرَقْنَاهُ لِتَقْرَأَهُ عَلَى النَّاسِ عَلَى مُكْثٍ وَنَزَّلْنَاهُ تَنْزِيلًا} [الإسراء 106]