Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
quran:18:57

And who is more unjust than one who is reminded of the verses of his Lord but turns away from them and forgets what his hands have put forth? Indeed, We have placed over their hearts coverings, lest they understand it, and in their ears deafness. And if you invite them to guidance - they will never be guided, then - ever.  

And who does greater wrong than he who has been reminded of the signs of his Lord, yet turns away from them and forgets what his hands have sent ahead?, what he has committed in the way of disbelief and acts of disobedience. Indeed on their hearts We have cast veils, coverings, lest they should understand it, that is, lest they should comprehend the Qur’ān, in other words, and so ˹as a result˺ they do not comprehend it; and in their ears a deafness, a heaviness, and so they do not hear it; and though you call them to guidance, they will not be guided in that case, that is, given the casting ˹of veils˺ mentioned, ever.
القرآن:١٨:٥٧

وَمَنْ أَظْلَمُ مِمَّنْ ذُكِّرَ بِآيَاتِ رَبِّهِ فَأَعْرَضَ عَنْهَا وَنَسِيَ مَا قَدَّمَتْ يَدَاهُ ۚ إِنَّا جَعَلْنَا عَلَىٰ قُلُوبِهِمْ أَكِنَّةً أَنْ يَفْقَهُوهُ وَفِي آذَانِهِمْ وَقْرًا ۖ وَإِنْ تَدْعُهُمْ إِلَى الْهُدَىٰ فَلَنْ يَهْتَدُوا إِذًا أَبَدًا  

{ومن أظلم ممن ذكر بآيات ربه فأعرض عنها ونسي ما قدمت يداه} ما عمل من الكفر والمعاصي {إنا جعلنا على قلوبهم أكنَّة} أغطية {أن يفقهوه} أي من أن يفهموا القرآن أي فلا يفهمونه {وفي آذانهم وقرا} ثقلاً فلا يسمعونه {وإن تدعهم إلى الهدى فلن يهتدوا إذا} أي بالجعل المذكور {أبدا}.