Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that the Prophet (peace and blessings be upon him) said: "Allah does not listen to anything as attentively as He listens to a prophet who recites the Qur'an melodiously." One of his companions added: "reciting it aloud."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 21041