Explained in detail 41:3
كِتَٰبٌ فُصِّلَتْ ءَايَٰتُهُۥ قُرْءَانًا عَرَبِيًّا لِّقَوْمٍ يَعْلَمُونَ
A Book whose verses have been detailed, an Arabic Qur'an for a people who know,
Saheeh International
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