وَقَالَ ٱلَّذِينَ كَفَرُوا۟ لَوْلَا نُزِّلَ عَلَيْهِ ٱلْقُرْءَانُ جُمْلَةً وَٰحِدَةً ۚ كَذَٰلِكَ لِنُثَبِّتَ بِهِۦ فُؤَادَكَ ۖ وَرَتَّلْنَـٰهُ تَرْتِيلًا

Al-Furqan — Ayah 32

The Criterion · الفرقان · 25:32

Said those who disbelieved, “Why has the Qur’ān not been revealed to him all at once?” (It has been sent down) in this way (i.e. in parts) so that We make your heart firm, and We revealed it little by little.

Translation: Mufti Taqi Usmani