And those who disbelieve say, "Why was the Qur'an not revealed to him all at once?" Thus ˹it is˺ that We may strengthen thereby your heart. And We have spaced it distinctly.
وَقَالَ الَّذِينَ كَفَرُوا لَوْلَا نُزِّلَ عَلَيْهِ الْقُرْآنُ جُمْلَةً وَاحِدَةً ۚ كَذَٰلِكَ لِنُثَبِّتَ بِهِ فُؤَادَكَ ۖ وَرَتَّلْنَاهُ تَرْتِيلًا
[Machine] The Quran was revealed in its entirety in one night, which is the Night of Decree. Allah used to reveal it to the Messenger of Allah piece by piece. They said, "Why was the Quran not revealed to him all at once? In that case, your heart would have been firm, but it was revealed piecemeal." [Surah Al-Furqan, 32]
نَزَلَ الْقُرْآنُ جُمْلَةً وَاحِدَةً فِي لَيْلَةِ الْقَدْرِ وَكَانَ اللهُ ﷻ يُنَزِّلُ عَلَى رَسُولِ اللهِ ﷺ بَعْضَهُ فِي أَثَرِ بَعْضٍ قَالُوا {لَوْلَا نُزِّلَ عَلَيْهِ الْقُرْآنُ جُمْلَةً وَاحِدَةً كَذَلِكَ لِنُثَبِّتَ بِهِ فُؤَادَكَ وَرَتَّلْنَاهَ تَرْتِيلًا} [الفرقان 32]