Al-Qamar 54:22

وَلَقَدْ يَسَّرْنَا ٱلْقُرْءَانَ لِلذِّكْرِ فَهَلْ مِن مُّدَّكِرٍ ﴿٢٢﴾

Certainly We have made the Quran simple for the sake of admonishment. So is there anyone who will be admonished?

Exegesis

This verse, like the previous one, has been repeated four times throughout this chapter, after describing every nation.