Sunan an-Nasa'i, Hadith 2561 ⓘ
It was narrated from 'Uqbah bin 'Amir that the Messenger of Allah said: "The one who recites the Qur'an loudly is like one who gives charity openly, and the one who recites the Qur'an quietly is like one who gives charity in secret."
أَخْبَرَنَا مُحَمَّدُ بْنُ سَلَمَةَ، قَالَ حَدَّثَنَا ابْنُ وَهْبٍ، عَنْ مُعَاوِيَةَ بْنِ صَالِحٍ، عَنْ بَحِيرِ بْنِ سَعْدٍ، عَنْ خَالِدِ بْنِ مَعْدَانَ، عَنْ كَثِيرِ بْنِ مُرَّةَ، عَنْ عُقْبَةَ بْنِ عَامِرٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " الْجَاهِرُ بِالْقُرْآنِ كَالْجَاهِرِ بِالصَّدَقَةِ وَالْمُسِرُّ بِالْقُرْآنِ كَالْمُسِرِّ بِالصَّدَقَةِ " .
also referenced under: Book 23, Hadith 0 (In-Book) & Volume 3, Book 23, Hadith 2562 (DarusSalam)