Whoever does not recite the Qur'an in a pleasant tone Sahih al-Bukhari 5024
Arabic hadith text
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ "مَا أَذِنَ اللَّهُ لِشَىْءٍ مَا أَذِنَ لِلنَّبِيِّ أَنْ يَتَغَنَّى بِالْقُرْآنِ ". قَالَ سُفْيَانُ تَفْسِيرُهُ يَسْتَغْنِي بِهِ
Translation
Narrated Abu Huraira
The Prophet (ﷺ) I said, "Allah does not listen to a prophet as He listens to a prophet who recites the Qur'an in a loud and pleasant tone." Sufyan said, "This saying means: a prophet who regards the Qur'an as something that makes him dispense with many worldly pleasures."