وَلَقَدۡ جِئۡنٰهُمۡ بِكِتٰبٍ فَصَّلۡنٰهُ عَلٰي عِلۡمٍ هُدًي وَّرَحۡمَةً لِّقَوۡمٍ يُّؤۡمِنُوۡنَ

And We had certainly brought them a Book which We detailed by knowledge - as guidance and mercy to a people who believe