Sunan Abi Dawud Book 5, Hadith 83
The Messenger of Allah (ﷺ) retired to the mosque. He heard them (the people) reciting the Qur'an in a loud voice. He removed the curtain and said: Lo! every one of you is calling his Lord quietly. One should not trouble the other and one should not raise the voice in recitation or in prayer over the voice of the other.
A man got up at night and recited the Qur'an in a loud voice. When the dawn came, the Messenger of Allah (ﷺ) said: May Allah have mercy on so-and-so who reminded me many verses that I had nearly forgotten.
Abu Dawud said: Harun al-Nahwi transmitted from Hammad b. Salamah the Quranic verse of Surah Al-'Imran: "How many of the prophet fought (in Allah's way)" (3:146)
The Prophet (ﷺ) said: One who recites the Qur'an in a loud voice is like one who gives alms openly; and one who recites the Qur'an quietly is one who gives alms secretly.