Knowledge ('Ilm) in Revelation

وَلَقَدْ جِئْنَـٰهُم بِكِتَـٰبٍ فَصَّلْنَـٰهُ عَلَىٰ عِلْمٍ هُدًى وَرَحْمَةً لِّقَوْمٍ يُؤْمِنُونَ

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