3:20 (Ummy Defined)

One of the methods the Quran utilizes to clarify the meaning of words is by means of providing contrasting examples such that one can understand the meaning of something by understanding its opposite.

39:23 GOD has revealed herein the best Hadith; a book that is consistent and points out contrasting pairs. The skins of those who reverence their Lord cringe therefrom, then their skins and their hearts soften up for GOD’s message. Such is GOD’s guidance; He bestows it upon whomever He wills. As for those sent astray by GOD, nothing can guide them. ٱللَّهُ نَزَّلَ أَحْسَنَ ٱلْحَدِيثِ كِتَـٰبًا مُّتَشَـٰبِهًا مَّثَانِىَ تَقْشَعِرُّ مِنْهُ جُلُودُ ٱلَّذِينَ يَخْشَوْنَ رَبَّهُمْ ثُمَّ تَلِينُ جُلُودُهُمْ وَقُلُوبُهُمْ إِلَىٰ ذِكْرِ ٱللَّهِ ذَٰلِكَ هُدَى ٱللَّهِ يَهْدِى بِهِۦ مَن يَشَآءُ وَمَن يُضْلِلِ ٱللَّهُ فَمَا لَهُۥ مِنْ هَادٍ