طه مَا أَنزَلْنَا عَلَيْكَ الْقُرْآنَ لِتَشْقَىٰ
Ta. Ha.We have not sent down the Quran unto you to cause you distress (20:1-2)
From this ayah we learn that anyone who abandons the Quran will be distressed and ruined. This is explicitly mentioned in the following ayats in the same surah.