(Al Qamar) 54 : 22
وَلَقَدْ يَسَّرْنَا الْقُرْآنَ لِلذِّكْرِ فَهَلْ مِنْ مُدَّكِرٍ
And surely We have made this Reading very easy to understand with the heart; then is there anyone to accept the Admonition?
See explanation 54: 17.