Allah does not listen as attentively to anything as He listens to a prophet with a melodious voice
Authentic hadithعن أبي هريرة رضي الله عنه عن النبي صلى الله عليه وسلم قال: «ما أذنَ الله لشيء ما أَذِنَ لنبي حسن الصوت يَتَغَنَّى بالقرآن يجهر به».
Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Allah does not listen as attentively to anything as He listens to a prophet with a melodious voice chanting the Qur’an audibly."
Explanation
This Hadīth urges us to beautify and raise our voices when reciting the noble Qur’an. We ought to recite it in a sad tone while believing that the Qur'an makes us self-sufficient and in no need for other sources of information. "Chanting the Qur’an" means beautifying one’s voice in reciting, not singing the Qur’an like musical rhythms.
Source · Narrated by Bukhari & Muslim
From the Hadith Encyclopedia (hadeethenc.com).