32وَقالَ الَّذينَ كَفَروا لَولا نُزِّلَ عَلَيهِ القُرآنُ جُملَةً واحِدَةً ۚ كَذٰلِكَ لِنُثَبِّتَ بِهِ فُؤادَكَ ۖ وَرَتَّلناهُ تَرتيلًاQaribullah & DarwishThe unbelievers ask: 'Why was the Koran not sent down to him all at once' As such We strengthen your heart thereby, and We have recited it very distinctly.