Sahih Muslim
Sahih Muslim 792 b
It is recommended to make one’s voice beautiful when reciting Qur’an
Arabic hadith text
وَحَدَّثَنِي حَرْمَلَةُ بْنُ يَحْيَى، أَخْبَرَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ، ح وَحَدَّثَنِي يُونُسُ، بْنُ عَبْدِ الأَعْلَى أَخْبَرَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي عَمْرٌو، كِلاَهُمَا عَنِ ابْنِ شِهَابٍ، بِهَذَا الإِسْنَادِ قَالَ " كَمَا يَأْذَنُ لِنَبِيٍّ يَتَغَنَّى بِالْقُرْآنِ
Translation
This hadith has been narrated by Ibn Shihab with the same chain of transmitters with words
" As He listens to a Prophet reciting the Qur'an in a sweet voice."